./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_compare_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_compare_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW --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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:21:14,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:21:14,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:21:14,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:21:14,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:21:14,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:21:14,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:21:14,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:21:14,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:21:14,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:21:14,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:21:14,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:21:14,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:21:14,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:21:14,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:21:14,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:21:14,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:21:14,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:21:14,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:21:14,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:21:14,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:21:14,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:21:14,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:21:14,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:21:14,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:21:14,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:21:14,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:21:14,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:21:14,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:21:14,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:21:14,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:21:14,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:21:14,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:21:14,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:21:14,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:21:14,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:21:14,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:21:14,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:21:14,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:21:14,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:21:14,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:21:14,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:21:14,511 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:21:14,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:21:14,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:21:14,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:21:14,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:21:14,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:21:14,514 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:21:14,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:21:14,515 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:21:14,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:21:14,516 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:21:14,517 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:21:14,517 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:21:14,517 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:21:14,518 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:21:14,518 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:21:14,518 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:21:14,518 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:21:14,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:21:14,520 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:21:14,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:21:14,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:21:14,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:21:14,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:21:14,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:21:14,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:21:14,523 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:21:14,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:21:14,523 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:21:14,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:21:14,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:21:14,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:21:14,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:14,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:21:14,525 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:21:14,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:21:14,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:21:14,526 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:21:14,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:21:14,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:21:14,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:21:14,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2022-11-23 15:21:14,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:21:14,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:21:14,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:21:14,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:21:14,881 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:21:14,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-11-23 15:21:17,963 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:21:18,174 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:21:18,174 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-11-23 15:21:18,181 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/data/8782633ca/0c51c683fb934425beb2e26bb47c3706/FLAG07687a8d9 [2022-11-23 15:21:18,198 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/data/8782633ca/0c51c683fb934425beb2e26bb47c3706 [2022-11-23 15:21:18,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:21:18,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:21:18,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:18,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:21:18,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:21:18,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6adc24ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18, skipping insertion in model container [2022-11-23 15:21:18,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:21:18,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:21:18,448 WARN L237 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_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-11-23 15:21:18,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:18,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:21:18,499 WARN L237 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_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-11-23 15:21:18,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:21:18,536 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:21:18,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18 WrapperNode [2022-11-23 15:21:18,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:21:18,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:18,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:21:18,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:21:18,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,601 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-23 15:21:18,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:21:18,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:21:18,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:21:18,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:21:18,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,648 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:21:18,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:21:18,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:21:18,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:21:18,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (1/1) ... [2022-11-23 15:21:18,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:21:18,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:18,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:21:18,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:21:18,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:21:18,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:21:18,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:21:18,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:21:18,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:21:18,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:21:18,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:21:18,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:21:18,834 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:21:18,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:21:19,090 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:21:19,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:21:19,126 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:21:19,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:19 BoogieIcfgContainer [2022-11-23 15:21:19,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:21:19,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:21:19,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:21:19,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:21:19,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:18" (1/3) ... [2022-11-23 15:21:19,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb809b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:19, skipping insertion in model container [2022-11-23 15:21:19,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:18" (2/3) ... [2022-11-23 15:21:19,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fb809b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:19, skipping insertion in model container [2022-11-23 15:21:19,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:19" (3/3) ... [2022-11-23 15:21:19,153 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2022-11-23 15:21:19,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:21:19,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:21:19,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:21:19,309 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7869a891, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:21:19,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:21:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:19,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:21:19,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:19,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:19,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:19,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1742582732, now seen corresponding path program 1 times [2022-11-23 15:21:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:19,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225538212] [2022-11-23 15:21:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:19,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225538212] [2022-11-23 15:21:19,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225538212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:19,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:21:19,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:21:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925256157] [2022-11-23 15:21:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:21:19,730 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:19,804 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-11-23 15:21:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:21:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:19,814 INFO L225 Difference]: With dead ends: 21 [2022-11-23 15:21:19,815 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 15:21:19,818 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:21:19,821 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:19,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 15:21:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 15:21:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 15:21:19,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-23 15:21:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:19,855 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 15:21:19,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 15:21:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:21:19,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:19,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:19,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:21:19,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash 707561901, now seen corresponding path program 1 times [2022-11-23 15:21:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094892445] [2022-11-23 15:21:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:21:19,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094892445] [2022-11-23 15:21:19,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094892445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244263281] [2022-11-23 15:21:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:19,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:19,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:21:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:20,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:21:20,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:21:20,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:21:20,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244263281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:21:20,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:21:20,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:21:20,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456192099] [2022-11-23 15:21:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:21:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:21:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:21:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:20,099 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-23 15:21:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:20,139 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2022-11-23 15:21:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:21:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:21:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:20,141 INFO L225 Difference]: With dead ends: 17 [2022-11-23 15:21:20,141 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 15:21:20,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:21:20,143 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:20,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 15:21:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 15:21:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-23 15:21:20,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-23 15:21:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:20,148 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-23 15:21:20,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-23 15:21:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-23 15:21:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:21:20,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:20,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:20,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:21:20,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:21:20,360 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash 468576439, now seen corresponding path program 1 times [2022-11-23 15:21:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:20,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703073943] [2022-11-23 15:21:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:20,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:21:20,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703073943] [2022-11-23 15:21:20,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703073943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840581341] [2022-11-23 15:21:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:20,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:20,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:21:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:21:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:21:20,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:21:20,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840581341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491328246] [2022-11-23 15:21:20,686 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:20,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:20,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:20,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:20,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:20,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,820 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:20,821 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,904 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:20,904 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:20,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:21:21,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:21,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:21,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:21,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:21,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:21,291 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:21:21,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:21:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:21,670 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:21,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:21,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:22,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:22,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:22,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:22,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:21:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624153360] [2022-11-23 15:21:22,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:21:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:21:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:21:22,111 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:22,142 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-11-23 15:21:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:21:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:21:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:22,144 INFO L225 Difference]: With dead ends: 22 [2022-11-23 15:21:22,144 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 15:21:22,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:21:22,145 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:22,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 15:21:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 15:21:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2022-11-23 15:21:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-23 15:21:22,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-11-23 15:21:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:22,149 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-23 15:21:22,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-23 15:21:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:21:22,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:22,150 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:22,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:22,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:22,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash 156444880, now seen corresponding path program 2 times [2022-11-23 15:21:22,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:22,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530103035] [2022-11-23 15:21:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:22,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:22,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:22,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530103035] [2022-11-23 15:21:22,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530103035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190578454] [2022-11-23 15:21:22,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:21:22,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:22,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:22,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:21:22,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:21:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:21:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:22,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190578454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:22,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691042636] [2022-11-23 15:21:22,658 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:22,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:22,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:22,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:22,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,708 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:22,709 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:22,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,769 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:22,770 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:21:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:22,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:22,948 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:21:22,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:21:23,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:23,027 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:23,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:23,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:23,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:23,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:23,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:23,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:21:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765824225] [2022-11-23 15:21:23,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:21:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:21:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:21:23,348 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:23,374 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-11-23 15:21:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:21:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:21:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:23,375 INFO L225 Difference]: With dead ends: 23 [2022-11-23 15:21:23,375 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 15:21:23,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:21:23,377 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:23,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 15:21:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 15:21:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-11-23 15:21:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-23 15:21:23,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-11-23 15:21:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:23,382 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-23 15:21:23,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-23 15:21:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 15:21:23,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:23,383 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:23,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:21:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:23,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 950999412, now seen corresponding path program 3 times [2022-11-23 15:21:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:23,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419159966] [2022-11-23 15:21:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:23,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419159966] [2022-11-23 15:21:23,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419159966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597997329] [2022-11-23 15:21:23,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:21:23,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:23,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:23,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:23,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:21:23,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:21:23,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:23,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:21:23,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:23,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:23,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597997329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:23,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233916206] [2022-11-23 15:21:23,961 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:23,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:23,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:23,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:23,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,028 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:24,028 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,044 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:21:24,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:24,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:24,221 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:21:24,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:21:24,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:24,312 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:24,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:24,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:24,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '480#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:24,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:24,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:24,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:21:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429131822] [2022-11-23 15:21:24,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:24,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:21:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:21:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:21:24,656 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:24,705 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-23 15:21:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:21:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 15:21:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:24,707 INFO L225 Difference]: With dead ends: 34 [2022-11-23 15:21:24,708 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 15:21:24,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:21:24,710 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:24,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 15:21:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 15:21:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2022-11-23 15:21:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-23 15:21:24,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-11-23 15:21:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:24,721 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-23 15:21:24,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-23 15:21:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 15:21:24,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:24,724 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:24,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:24,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash 189722324, now seen corresponding path program 4 times [2022-11-23 15:21:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901094754] [2022-11-23 15:21:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:25,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901094754] [2022-11-23 15:21:25,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901094754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842583541] [2022-11-23 15:21:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:21:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:25,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:25,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:21:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:21:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:25,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:25,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842583541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329250765] [2022-11-23 15:21:25,661 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:25,662 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:25,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:25,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:25,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,726 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:25,726 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,744 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:21:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:25,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:25,942 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:21:25,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:21:26,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:26,247 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:26,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:26,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:26,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '728#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:26,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:26,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:26,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:21:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366214572] [2022-11-23 15:21:26,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:21:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:21:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-23 15:21:26,578 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:26,634 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-11-23 15:21:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:21:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 15:21:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:26,636 INFO L225 Difference]: With dead ends: 46 [2022-11-23 15:21:26,636 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 15:21:26,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2022-11-23 15:21:26,637 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:26,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:21:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 15:21:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 15:21:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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) [2022-11-23 15:21:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 15:21:26,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2022-11-23 15:21:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:26,644 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 15:21:26,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 15:21:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:21:26,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:26,645 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:26,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 15:21:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:26,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash -503578220, now seen corresponding path program 5 times [2022-11-23 15:21:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119703369] [2022-11-23 15:21:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:21:27,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119703369] [2022-11-23 15:21:27,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119703369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630366298] [2022-11-23 15:21:27,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:21:27,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:27,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:27,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:21:27,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:21:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:21:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:21:27,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:21:28,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630366298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:28,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977792586] [2022-11-23 15:21:28,033 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:28,033 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:28,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:28,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:28,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,089 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:28,090 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,104 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:21:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:28,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:28,289 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:21:28,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:21:28,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:28,373 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:28,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:28,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:28,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1106#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:28,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:28,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:28,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 15:21:28,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591822358] [2022-11-23 15:21:28,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:21:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:21:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:21:28,819 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:28,933 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-23 15:21:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:21:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 15:21:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:28,934 INFO L225 Difference]: With dead ends: 53 [2022-11-23 15:21:28,934 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 15:21:28,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:21:28,936 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:28,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 15:21:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-23 15:21:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-23 15:21:28,943 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2022-11-23 15:21:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:28,943 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-23 15:21:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:21:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-23 15:21:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:21:28,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:28,944 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:28,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:29,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:21:29,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1097726579, now seen corresponding path program 6 times [2022-11-23 15:21:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:29,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621046492] [2022-11-23 15:21:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:29,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:30,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621046492] [2022-11-23 15:21:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621046492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144030525] [2022-11-23 15:21:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:21:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:30,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:30,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:30,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:21:30,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:21:30,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:21:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:31,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144030525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098564672] [2022-11-23 15:21:31,310 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:31,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:31,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:31,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:31,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,357 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:31,357 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,405 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:31,405 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:21:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:31,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:31,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:31,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:31,602 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:21:31,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:21:31,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:31,879 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:31,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:31,984 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:32,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1570#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:32,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:32,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:32,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 15:21:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070277938] [2022-11-23 15:21:32,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:21:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:32,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:21:32,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=1890, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 15:21:32,307 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-11-23 15:21:32,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:32,448 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2022-11-23 15:21:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 15:21:32,449 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 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 40 [2022-11-23 15:21:32,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:32,450 INFO L225 Difference]: With dead ends: 84 [2022-11-23 15:21:32,450 INFO L226 Difference]: Without dead ends: 67 [2022-11-23 15:21:32,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1302, Invalid=1890, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 15:21:32,452 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:32,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-23 15:21:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-23 15:21:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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) [2022-11-23 15:21:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-11-23 15:21:32,460 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 40 [2022-11-23 15:21:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:32,461 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-11-23 15:21:32,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-11-23 15:21:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-11-23 15:21:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 15:21:32,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:32,467 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:32,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:32,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:21:32,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -312385356, now seen corresponding path program 7 times [2022-11-23 15:21:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:32,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205587067] [2022-11-23 15:21:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:32,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:35,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205587067] [2022-11-23 15:21:35,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205587067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981719772] [2022-11-23 15:21:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:21:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:35,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:35,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:21:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:21:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:35,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:39,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981719772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975233569] [2022-11-23 15:21:39,074 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:39,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:39,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:39,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:39,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:39,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,135 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:39,135 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:39,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,192 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:39,193 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:39,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:21:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:39,343 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:21:39,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:21:39,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:39,448 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:39,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:39,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:40,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2346#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:40,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:40,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:40,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 15:21:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138357018] [2022-11-23 15:21:40,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:40,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 15:21:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 15:21:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5077, Invalid=6265, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 15:21:40,011 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 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) [2022-11-23 15:21:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:40,247 INFO L93 Difference]: Finished difference Result 134 states and 187 transitions. [2022-11-23 15:21:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:21:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 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 65 [2022-11-23 15:21:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:40,254 INFO L225 Difference]: With dead ends: 134 [2022-11-23 15:21:40,254 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 15:21:40,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5077, Invalid=6265, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 15:21:40,260 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:40,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:21:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 15:21:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-23 15:21:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 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) [2022-11-23 15:21:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-11-23 15:21:40,289 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 65 [2022-11-23 15:21:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:40,290 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-11-23 15:21:40,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 100 states have internal predecessors, (108), 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) [2022-11-23 15:21:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-11-23 15:21:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:21:40,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:40,295 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:40,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:40,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:40,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1192348972, now seen corresponding path program 8 times [2022-11-23 15:21:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:40,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901953081] [2022-11-23 15:21:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:21:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 15:21:49,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:21:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901953081] [2022-11-23 15:21:49,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901953081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:21:49,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670957081] [2022-11-23 15:21:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:21:49,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:49,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:21:49,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:21:49,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:21:49,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 15:21:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:21:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:21:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:21:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-23 15:21:50,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:21:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-11-23 15:21:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670957081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:21:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [861714740] [2022-11-23 15:21:50,935 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:21:50,935 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:21:50,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:21:50,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:21:50,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:21:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:50,982 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:21:50,983 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:50,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:50,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,046 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:21:51,046 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:21:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:21:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:51,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:21:51,209 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:21:51,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:21:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:21:51,274 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:21:51,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:21:51,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:21:52,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3644#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:21:52,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:21:52,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:21:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 15:21:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796792957] [2022-11-23 15:21:52,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:21:52,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 15:21:52,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:21:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 15:21:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5352, Invalid=11160, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 15:21:52,124 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 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) [2022-11-23 15:21:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:21:52,383 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2022-11-23 15:21:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 15:21:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 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 115 [2022-11-23 15:21:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:21:52,385 INFO L225 Difference]: With dead ends: 147 [2022-11-23 15:21:52,385 INFO L226 Difference]: Without dead ends: 130 [2022-11-23 15:21:52,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5352, Invalid=11160, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 15:21:52,391 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:21:52,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:21:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-23 15:21:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-23 15:21:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 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) [2022-11-23 15:21:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-11-23 15:21:52,404 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 115 [2022-11-23 15:21:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:21:52,404 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-11-23 15:21:52,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 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) [2022-11-23 15:21:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-11-23 15:21:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 15:21:52,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:21:52,407 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:21:52,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:21:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:21:52,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:21:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:21:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1606713779, now seen corresponding path program 9 times [2022-11-23 15:21:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:21:52,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644467182] [2022-11-23 15:21:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:21:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:21:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:22:00,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644467182] [2022-11-23 15:22:00,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644467182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31883387] [2022-11-23 15:22:00,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:22:00,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:00,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:00,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:22:01,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:22:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:22:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 15:22:01,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:22:01,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:22:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31883387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787128459] [2022-11-23 15:22:13,753 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:22:13,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:13,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:13,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:13,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,793 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:22:13,794 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:22:13,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,840 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:22:13,840 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:22:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:22:13,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:22:13,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:13,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:13,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:14,016 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:22:14,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:22:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:22:14,266 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:22:14,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:22:14,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:22:15,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5152#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:22:15,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:22:15,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:22:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 15:22:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580888403] [2022-11-23 15:22:15,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:22:15,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 15:22:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:22:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 15:22:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20530, Invalid=22942, Unknown=0, NotChecked=0, Total=43472 [2022-11-23 15:22:15,021 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 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) [2022-11-23 15:22:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:22:15,769 INFO L93 Difference]: Finished difference Result 260 states and 364 transitions. [2022-11-23 15:22:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 15:22:15,770 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 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 128 [2022-11-23 15:22:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:22:15,772 INFO L225 Difference]: With dead ends: 260 [2022-11-23 15:22:15,772 INFO L226 Difference]: Without dead ends: 231 [2022-11-23 15:22:15,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=20530, Invalid=22942, Unknown=0, NotChecked=0, Total=43472 [2022-11-23 15:22:15,776 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:22:15,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:22:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-23 15:22:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-23 15:22:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 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) [2022-11-23 15:22:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-11-23 15:22:15,792 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 128 [2022-11-23 15:22:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:22:15,792 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-11-23 15:22:15,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0344827586206897) internal successors, (210), 202 states have internal predecessors, (210), 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) [2022-11-23 15:22:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-11-23 15:22:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-23 15:22:15,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:22:15,796 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:22:15,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:22:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:22:16,006 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:22:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:22:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 609088308, now seen corresponding path program 10 times [2022-11-23 15:22:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:22:16,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289743775] [2022-11-23 15:22:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:22:16,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:22:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:22:44,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:22:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289743775] [2022-11-23 15:22:44,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289743775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:22:44,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898898170] [2022-11-23 15:22:44,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:22:44,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:22:44,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:22:44,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:22:44,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:22:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:22:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 3556 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 15:22:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:22:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:22:45,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:23:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:23:34,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898898170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:23:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330494610] [2022-11-23 15:23:34,887 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:23:34,887 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:23:34,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:23:34,887 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:23:34,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:23:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:34,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:34,929 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:23:34,930 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:23:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:34,983 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:23:34,984 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:23:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:35,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:23:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:35,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:23:35,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:23:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:23:35,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:23:35,133 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:23:35,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:23:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:23:35,358 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:23:35,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:23:35,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:23:36,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7896#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:23:36,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:23:36,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:23:36,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 15:23:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858218055] [2022-11-23 15:23:36,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:23:36,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 15:23:36,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 15:23:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81837, Invalid=86673, Unknown=0, NotChecked=0, Total=168510 [2022-11-23 15:23:36,607 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 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) [2022-11-23 15:23:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:23:39,407 INFO L93 Difference]: Finished difference Result 462 states and 667 transitions. [2022-11-23 15:23:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 15:23:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 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 229 [2022-11-23 15:23:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:23:39,411 INFO L225 Difference]: With dead ends: 462 [2022-11-23 15:23:39,411 INFO L226 Difference]: Without dead ends: 433 [2022-11-23 15:23:39,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4418 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=81837, Invalid=86673, Unknown=0, NotChecked=0, Total=168510 [2022-11-23 15:23:39,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:23:39,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:23:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-23 15:23:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-23 15:23:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0069444444444444) internal successors, (435), 432 states have internal predecessors, (435), 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) [2022-11-23 15:23:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 435 transitions. [2022-11-23 15:23:39,447 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 435 transitions. Word has length 229 [2022-11-23 15:23:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:23:39,448 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 435 transitions. [2022-11-23 15:23:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.017283950617284) internal successors, (412), 404 states have internal predecessors, (412), 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) [2022-11-23 15:23:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 435 transitions. [2022-11-23 15:23:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2022-11-23 15:23:39,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:23:39,458 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:23:39,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:23:39,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:23:39,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:23:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:23:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1169662676, now seen corresponding path program 11 times [2022-11-23 15:23:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:23:39,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309549611] [2022-11-23 15:23:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:23:39,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:23:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-23 15:25:32,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309549611] [2022-11-23 15:25:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309549611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939839777] [2022-11-23 15:25:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:25:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:32,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:32,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:25:37,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 15:25:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:25:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:25:37,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-23 15:25:41,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2022-11-23 15:25:46,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939839777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:46,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668063643] [2022-11-23 15:25:46,009 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:25:46,009 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:46,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:46,010 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:46,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,060 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:25:46,061 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:25:46,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,076 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:25:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-23 15:25:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:46,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:46,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:46,208 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:25:46,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-23 15:25:46,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:46,275 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:25:46,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:25:46,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:48,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12706#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:48,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:48,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:48,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-23 15:25:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870353627] [2022-11-23 15:25:48,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-23 15:25:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-23 15:25:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82964, Invalid=125428, Unknown=0, NotChecked=0, Total=208392 [2022-11-23 15:25:48,502 INFO L87 Difference]: Start difference. First operand 433 states and 435 transitions. Second operand has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 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) [2022-11-23 15:25:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:51,540 INFO L93 Difference]: Finished difference Result 487 states and 515 transitions. [2022-11-23 15:25:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-23 15:25:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 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 431 [2022-11-23 15:25:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:51,544 INFO L225 Difference]: With dead ends: 487 [2022-11-23 15:25:51,544 INFO L226 Difference]: Without dead ends: 458 [2022-11-23 15:25:51,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1695 GetRequests, 1240 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21306 ImplicationChecksByTransitivity, 74.0s TimeCoverageRelationStatistics Valid=82964, Invalid=125428, Unknown=0, NotChecked=0, Total=208392 [2022-11-23 15:25:51,555 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:51,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:25:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-23 15:25:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-11-23 15:25:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.0065645514223194) internal successors, (460), 457 states have internal predecessors, (460), 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) [2022-11-23 15:25:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 460 transitions. [2022-11-23 15:25:51,580 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 460 transitions. Word has length 431 [2022-11-23 15:25:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:51,581 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 460 transitions. [2022-11-23 15:25:51,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0199556541019956) internal successors, (460), 451 states have internal predecessors, (460), 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) [2022-11-23 15:25:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 460 transitions. [2022-11-23 15:25:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2022-11-23 15:25:51,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:51,592 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:51,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:51,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1525902771, now seen corresponding path program 12 times [2022-11-23 15:25:51,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:51,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611917565] [2022-11-23 15:25:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:27:46,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611917565] [2022-11-23 15:27:46,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611917565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979642149] [2022-11-23 15:27:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:27:46,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:46,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:46,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:46,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:27:48,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:27:48,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:27:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 7103 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-23 15:27:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:27:49,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:31:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 82487 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-23 15:31:05,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979642149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:31:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267172620] [2022-11-23 15:31:05,405 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:31:05,405 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:31:05,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:31:05,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:31:05,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:31:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,449 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 15:31:05,449 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:31:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,495 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 15:31:05,495 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:31:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 35 [2022-11-23 15:31:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:31:05,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:05,648 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:31:05,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-23 15:31:05,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:31:05,891 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:31:05,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:31:05,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:31:07,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18126#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~rv~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~rv~0#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~rv~0#1| 0)) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:31:07,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:31:07,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:31:07,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-23 15:31:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233345268] [2022-11-23 15:31:07,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:31:07,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-23 15:31:07,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:31:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-23 15:31:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328482, Invalid=338190, Unknown=0, NotChecked=0, Total=666672 [2022-11-23 15:31:08,055 INFO L87 Difference]: Start difference. First operand 458 states and 460 transitions. Second operand has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 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) [2022-11-23 15:31:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:25,325 INFO L93 Difference]: Finished difference Result 916 states and 1324 transitions. [2022-11-23 15:31:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-23 15:31:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 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 456 [2022-11-23 15:31:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:25,330 INFO L225 Difference]: With dead ends: 916 [2022-11-23 15:31:25,331 INFO L226 Difference]: Without dead ends: 863 [2022-11-23 15:31:25,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1771 GetRequests, 956 SyntacticMatches, 0 SemanticMatches, 815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8884 ImplicationChecksByTransitivity, 261.3s TimeCoverageRelationStatistics Valid=328482, Invalid=338190, Unknown=0, NotChecked=0, Total=666672 [2022-11-23 15:31:25,364 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:25,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:31:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-23 15:31:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-11-23 15:31:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.0034802784222738) internal successors, (865), 862 states have internal predecessors, (865), 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) [2022-11-23 15:31:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 865 transitions. [2022-11-23 15:31:25,394 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 865 transitions. Word has length 456 [2022-11-23 15:31:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:25,395 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 865 transitions. [2022-11-23 15:31:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0086313193588163) internal successors, (818), 810 states have internal predecessors, (818), 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) [2022-11-23 15:31:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 865 transitions. [2022-11-23 15:31:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2022-11-23 15:31:25,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:25,404 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:25,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:25,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f54b76a2-d8a7-44d5-8b1b-f9cecddc0995/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:25,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1039774516, now seen corresponding path program 13 times [2022-11-23 15:31:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:31:25,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490481151] [2022-11-23 15:31:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:31:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:31:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat