./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh --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 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 --- 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-2329fc7 [2022-12-14 15:13:38,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:13:38,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:13:38,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:13:38,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:13:38,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:13:38,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:13:38,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:13:38,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:13:38,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:13:38,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:13:38,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:13:38,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:13:38,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:13:38,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:13:38,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:13:38,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:13:38,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:13:38,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:13:38,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:13:38,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:13:38,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:13:38,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:13:38,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:13:38,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:13:38,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:13:38,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:13:38,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:13:38,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:13:38,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:13:38,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:13:38,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:13:38,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:13:38,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:13:38,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:13:38,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:13:38,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:13:38,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:13:38,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:13:38,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:13:38,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:13:38,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:13:38,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:13:38,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:13:38,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:13:38,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:13:38,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:13:38,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:13:38,554 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:13:38,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:13:38,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:13:38,556 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:13:38,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:13:38,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:13:38,556 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:13:38,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:13:38,557 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:13:38,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:13:38,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:13:38,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:13:38,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:13:38,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:13:38,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:13:38,559 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:13:38,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:13:38,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:13:38,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:13:38,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:13:38,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:13:38,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:13:38,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:13:38,560 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:13:38,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:13:38,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:13:38,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:13:38,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:13:38,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:13:38,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:13:38,561 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_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 [2022-12-14 15:13:38,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:13:38,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:13:38,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:13:38,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:13:38,784 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:13:38,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2022-12-14 15:13:41,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:13:41,560 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:13:41,560 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2022-12-14 15:13:41,565 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/data/1b9269610/074d8cd1ebc4403eb0f09ba61b70d74f/FLAG4f7c8cd21 [2022-12-14 15:13:41,576 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/data/1b9269610/074d8cd1ebc4403eb0f09ba61b70d74f [2022-12-14 15:13:41,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:13:41,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:13:41,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:13:41,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:13:41,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:13:41,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a344ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41, skipping insertion in model container [2022-12-14 15:13:41,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:13:41,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:13:41,714 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_861617bb-f850-4a8e-90da-78bd2f1e0c88/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2022-12-14 15:13:41,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:13:41,733 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:13:41,743 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_861617bb-f850-4a8e-90da-78bd2f1e0c88/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2022-12-14 15:13:41,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:13:41,764 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:13:41,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41 WrapperNode [2022-12-14 15:13:41,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:13:41,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:13:41,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:13:41,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:13:41,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,797 INFO L138 Inliner]: procedures = 16, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 115 [2022-12-14 15:13:41,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:13:41,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:13:41,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:13:41,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:13:41,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:13:41,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:13:41,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:13:41,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:13:41,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (1/1) ... [2022-12-14 15:13:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:13:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:41,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:13:41,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:13:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:13:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:13:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:13:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:13:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:13:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:13:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:13:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:13:41,943 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:13:41,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:13:42,089 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:13:42,135 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:13:42,136 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 15:13:42,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:13:42 BoogieIcfgContainer [2022-12-14 15:13:42,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:13:42,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:13:42,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:13:42,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:13:42,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:13:41" (1/3) ... [2022-12-14 15:13:42,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50820c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:13:42, skipping insertion in model container [2022-12-14 15:13:42,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:13:41" (2/3) ... [2022-12-14 15:13:42,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50820c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:13:42, skipping insertion in model container [2022-12-14 15:13:42,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:13:42" (3/3) ... [2022-12-14 15:13:42,148 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2022-12-14 15:13:42,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:13:42,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:13:42,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:13:42,216 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;@4aed47d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:13:42,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:13:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 15:13:42,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:42,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:42,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1787872001, now seen corresponding path program 1 times [2022-12-14 15:13:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591615010] [2022-12-14 15:13:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:13:42,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:42,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591615010] [2022-12-14 15:13:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591615010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:42,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:42,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:13:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553491406] [2022-12-14 15:13:42,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:42,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:13:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:13:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:13:42,508 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:42,555 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-12-14 15:13:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:13:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 15:13:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:42,564 INFO L225 Difference]: With dead ends: 23 [2022-12-14 15:13:42,564 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 15:13:42,566 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 [2022-12-14 15:13:42,570 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:42,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 15:13:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 15:13:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-12-14 15:13:42,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2022-12-14 15:13:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:42,597 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-12-14 15:13:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-12-14 15:13:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:13:42,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:42,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:42,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:13:42,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -582588356, now seen corresponding path program 1 times [2022-12-14 15:13:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:42,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250021734] [2022-12-14 15:13:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:13:42,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250021734] [2022-12-14 15:13:42,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250021734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:42,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801994782] [2022-12-14 15:13:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:42,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:42,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:42,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:13:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:13:42,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:13:42,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:13:42,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801994782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:42,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:13:42,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 15:13:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339739956] [2022-12-14 15:13:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:42,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:13:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:13:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:13:42,816 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:42,848 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-12-14 15:13:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:13:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 15:13:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:42,849 INFO L225 Difference]: With dead ends: 24 [2022-12-14 15:13:42,849 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 15:13:42,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:13:42,850 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:42,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 15:13:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 15:13:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-12-14 15:13:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-12-14 15:13:42,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-12-14 15:13:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:42,854 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-12-14 15:13:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-12-14 15:13:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 15:13:42,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:42,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:42,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 15:13:43,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:43,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1744700016, now seen corresponding path program 1 times [2022-12-14 15:13:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775022122] [2022-12-14 15:13:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:43,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:13:43,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775022122] [2022-12-14 15:13:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775022122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032579139] [2022-12-14 15:13:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:43,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:43,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:43,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:43,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:13:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:13:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:13:43,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:13:43,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032579139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369021912] [2022-12-14 15:13:43,294 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:43,294 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:43,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:43,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:43,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,530 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:43,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:13:43,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:43,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:43,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:43,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:43,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:43,967 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:13:43,968 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 500 treesize of output 490 [2022-12-14 15:13:44,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,616 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:44,616 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 [2022-12-14 15:13:44,645 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:44,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:44,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,710 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:44,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:44,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,774 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:44,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:44,797 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:44,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:44,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,862 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:44,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:44,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,933 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:44,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:44,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:44,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:44,992 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:44,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:45,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:45,028 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:45,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:45,055 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:45,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:45,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:45,102 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:45,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:45,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:45,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:45,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:45,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:45,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:45,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:45,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:45,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 15:13:45,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784780804] [2022-12-14 15:13:45,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:13:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:13:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:13:45,347 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-12-14 15:13:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:45,375 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-12-14 15:13:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:13:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) Word has length 14 [2022-12-14 15:13:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:45,376 INFO L225 Difference]: With dead ends: 32 [2022-12-14 15:13:45,376 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 15:13:45,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:13:45,377 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:45,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 15:13:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 15:13:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-12-14 15:13:45,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2022-12-14 15:13:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:45,380 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-12-14 15:13:45,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-12-14 15:13:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-12-14 15:13:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 15:13:45,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:45,381 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:45,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:13:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:45,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 158008469, now seen corresponding path program 2 times [2022-12-14 15:13:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285224301] [2022-12-14 15:13:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:13:45,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285224301] [2022-12-14 15:13:45,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285224301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:45,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268228283] [2022-12-14 15:13:45,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:13:45,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:45,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:45,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:45,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:13:45,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:13:45,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:13:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:13:45,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:13:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 15:13:45,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268228283] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:45,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697825595] [2022-12-14 15:13:45,758 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:45,758 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:45,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:45,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:45,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,875 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:13:45,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:13:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,024 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:46,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:46,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,222 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:13:46,222 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 520 treesize of output 488 [2022-12-14 15:13:46,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,331 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:46,331 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 [2022-12-14 15:13:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,366 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:46,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,402 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:46,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:46,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,441 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,462 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,497 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:46,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,540 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:46,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,600 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:46,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,657 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,675 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:46,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,729 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:46,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:46,778 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:46,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:46,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:46,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:46,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:46,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:46,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 15:13:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013090979] [2022-12-14 15:13:46,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:13:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:13:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:13:46,985 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-12-14 15:13:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:47,028 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-12-14 15:13:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:13:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) Word has length 17 [2022-12-14 15:13:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:47,028 INFO L225 Difference]: With dead ends: 42 [2022-12-14 15:13:47,028 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 15:13:47,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:13:47,029 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:47,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 15:13:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 15:13:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-12-14 15:13:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-14 15:13:47,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-12-14 15:13:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:47,034 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-14 15:13:47,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-12-14 15:13:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-14 15:13:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 15:13:47,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:47,034 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:47,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:13:47,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:47,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash 148958273, now seen corresponding path program 3 times [2022-12-14 15:13:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:47,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273637837] [2022-12-14 15:13:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:47,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273637837] [2022-12-14 15:13:47,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273637837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:47,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186311462] [2022-12-14 15:13:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:13:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:47,461 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:13:47,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:13:47,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:13:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:13:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:47,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186311462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704450393] [2022-12-14 15:13:47,592 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:47,592 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:47,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:47,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:47,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,719 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:47,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:13:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:47,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,016 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:13:48,016 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 500 treesize of output 490 [2022-12-14 15:13:48,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,479 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:48,480 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 [2022-12-14 15:13:48,500 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:48,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,551 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:48,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:48,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:48,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,610 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:48,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,644 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:48,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:48,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,674 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:48,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:48,693 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:48,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:48,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,745 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:48,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:48,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,820 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:48,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:48,836 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:48,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,885 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:48,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:48,926 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:48,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:48,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:49,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:49,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:49,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:49,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 15:13:49,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662791642] [2022-12-14 15:13:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:49,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:13:49,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:13:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:13:49,087 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2022-12-14 15:13:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:49,122 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-12-14 15:13:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:13:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) Word has length 29 [2022-12-14 15:13:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:49,123 INFO L225 Difference]: With dead ends: 62 [2022-12-14 15:13:49,123 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 15:13:49,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:13:49,124 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:49,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 15:13:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 15:13:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-12-14 15:13:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-12-14 15:13:49,127 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2022-12-14 15:13:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:49,127 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-12-14 15:13:49,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2022-12-14 15:13:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-12-14 15:13:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 15:13:49,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:49,128 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:49,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:13:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:49,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash -747926943, now seen corresponding path program 4 times [2022-12-14 15:13:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:49,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347805374] [2022-12-14 15:13:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:49,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347805374] [2022-12-14 15:13:49,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347805374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:49,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772048193] [2022-12-14 15:13:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:13:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:49,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:49,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:13:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:13:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:49,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772048193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589782023] [2022-12-14 15:13:49,871 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:49,871 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:49,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:49,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:49,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,004 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:13:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,245 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:13:50,246 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 500 treesize of output 490 [2022-12-14 15:13:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,672 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:50,673 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 [2022-12-14 15:13:50,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,695 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:50,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:50,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:50,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,725 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:50,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:50,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,752 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:50,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:50,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,771 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:50,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,810 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:50,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:50,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:50,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:50,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:50,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:50,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,919 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:50,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:50,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:50,973 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:50,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:50,992 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:50,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:51,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:51,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:51,056 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:51,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:51,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:51,107 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:51,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:51,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:51,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:51,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:51,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 15:13:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96249912] [2022-12-14 15:13:51,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:51,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:13:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:51,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:13:51,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:13:51,309 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 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) [2022-12-14 15:13:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:51,354 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-12-14 15:13:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:13:51,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 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) Word has length 35 [2022-12-14 15:13:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:51,355 INFO L225 Difference]: With dead ends: 74 [2022-12-14 15:13:51,356 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 15:13:51,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:13:51,357 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:51,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 15:13:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 15:13:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 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) [2022-12-14 15:13:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-12-14 15:13:51,362 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-12-14 15:13:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:51,362 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-12-14 15:13:51,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 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) [2022-12-14 15:13:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-12-14 15:13:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 15:13:51,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:51,363 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:51,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:13:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:51,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1111654751, now seen corresponding path program 5 times [2022-12-14 15:13:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:51,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447365420] [2022-12-14 15:13:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:51,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:13:52,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447365420] [2022-12-14 15:13:52,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447365420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:52,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648223111] [2022-12-14 15:13:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:13:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:52,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:52,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:52,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:13:52,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:13:52,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:13:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:13:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-12-14 15:13:52,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-12-14 15:13:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648223111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010801082] [2022-12-14 15:13:52,314 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:52,314 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:52,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:52,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:52,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:52,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,420 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:13:52,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:13:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,561 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:52,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:52,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:52,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:52,754 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:13:52,754 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 500 treesize of output 490 [2022-12-14 15:13:53,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,147 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:53,147 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 [2022-12-14 15:13:53,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,167 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:53,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,194 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:53,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:53,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,242 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:53,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,307 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:53,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:13:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,382 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:53,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,413 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:53,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,466 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:53,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,530 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:53,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:53,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:53,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:53,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:53,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:53,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:53,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:53,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:53,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 15:13:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466425356] [2022-12-14 15:13:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:13:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:13:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:13:53,765 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:53,861 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-12-14 15:13:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 15:13:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 15:13:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:53,862 INFO L225 Difference]: With dead ends: 99 [2022-12-14 15:13:53,863 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 15:13:53,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:13:53,864 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:13:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 15:13:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-12-14 15:13:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 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) [2022-12-14 15:13:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-12-14 15:13:53,872 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 47 [2022-12-14 15:13:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:53,872 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-12-14 15:13:53,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-12-14 15:13:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 15:13:53,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:53,874 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:53,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:13:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:54,076 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash 851470940, now seen corresponding path program 6 times [2022-12-14 15:13:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100820604] [2022-12-14 15:13:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:13:54,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100820604] [2022-12-14 15:13:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100820604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772226621] [2022-12-14 15:13:54,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:13:54,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:54,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:54,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:13:54,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:13:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:13:54,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:13:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:13:54,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:13:55,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772226621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:55,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412343681] [2022-12-14 15:13:55,387 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:13:55,387 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:55,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:55,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:55,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,498 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:13:55,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:13:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,647 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:13:55,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:13:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:13:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,814 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:13:55,814 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 520 treesize of output 488 [2022-12-14 15:13:55,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,929 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:55,929 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 [2022-12-14 15:13:55,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:55,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:55,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:55,996 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:55,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:56,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,029 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:56,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:56,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,047 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:56,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:56,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,075 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:56,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:13:56,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,100 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:56,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:56,118 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:56,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:56,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,172 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:56,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:56,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,210 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:56,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:56,224 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:56,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,266 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:13:56,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:13:56,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:56,325 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:56,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:56,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:56,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:56,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:56,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:56,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 15:13:56,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955010723] [2022-12-14 15:13:56,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:56,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:13:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:13:56,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:13:56,630 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:56,704 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2022-12-14 15:13:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 15:13:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 15:13:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:56,705 INFO L225 Difference]: With dead ends: 148 [2022-12-14 15:13:56,705 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 15:13:56,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:13:56,706 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:56,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:13:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 15:13:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-12-14 15:13:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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) [2022-12-14 15:13:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-12-14 15:13:56,715 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 72 [2022-12-14 15:13:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-12-14 15:13:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-12-14 15:13:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 15:13:56,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:56,717 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:56,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:13:56,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:56,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 99824193, now seen corresponding path program 7 times [2022-12-14 15:13:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501991167] [2022-12-14 15:13:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:13:58,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501991167] [2022-12-14 15:13:58,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501991167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:58,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073769625] [2022-12-14 15:13:58,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:13:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:58,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:58,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:13:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:13:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:13:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:14:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073769625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824747650] [2022-12-14 15:14:00,772 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:14:00,772 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:00,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:00,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:00,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,912 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:14:00,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:14:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:14:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:00,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:14:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:01,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,135 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:14:01,136 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 500 treesize of output 490 [2022-12-14 15:14:01,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,583 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:14:01,583 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 [2022-12-14 15:14:01,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,608 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:01,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:01,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,646 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:01,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,679 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:01,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:01,700 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:14:01,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:14:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,768 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:14:01,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:14:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,825 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:01,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,845 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:01,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,878 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:01,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:01,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,910 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:01,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:01,931 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:14:01,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:14:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:01,987 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:14:01,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:14:02,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:02,043 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:02,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:02,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:14:02,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3711#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:14:02,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:14:02,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:14:02,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 15:14:02,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609245370] [2022-12-14 15:14:02,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:14:02,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 15:14:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 15:14:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:14:02,405 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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) [2022-12-14 15:14:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:02,558 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2022-12-14 15:14:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 15:14:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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 97 [2022-12-14 15:14:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:02,560 INFO L225 Difference]: With dead ends: 198 [2022-12-14 15:14:02,560 INFO L226 Difference]: Without dead ends: 149 [2022-12-14 15:14:02,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:14:02,565 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:02,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:14:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-14 15:14:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-12-14 15:14:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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) [2022-12-14 15:14:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-12-14 15:14:02,591 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 97 [2022-12-14 15:14:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:02,591 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-12-14 15:14:02,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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) [2022-12-14 15:14:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-12-14 15:14:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 15:14:02,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:02,593 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:14:02,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:14:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:02,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash -666219871, now seen corresponding path program 8 times [2022-12-14 15:14:02,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:02,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957513622] [2022-12-14 15:14:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:14:08,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:08,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957513622] [2022-12-14 15:14:08,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957513622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:08,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421073957] [2022-12-14 15:14:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:14:08,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:08,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:08,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:14:13,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:14:13,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:14:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 15:14:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-12-14 15:14:14,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 5006 trivial. 0 not checked. [2022-12-14 15:14:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421073957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059407376] [2022-12-14 15:14:14,534 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:14:14,534 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:14,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:14,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:14,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,626 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:14:14,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:14:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,761 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:14:14,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:14:14,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:14:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:14,930 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:14:14,930 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 520 treesize of output 488 [2022-12-14 15:14:15,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,031 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:14:15,031 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 [2022-12-14 15:14:15,059 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:14:15,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:14:15,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,120 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:14:15,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:14:15,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,168 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:15,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:15,185 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:14:15,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:14:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,239 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:14:15,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:14:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:15,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:15,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:15,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,371 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:15,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:15,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,410 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:15,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:15,430 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:14:15,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:14:15,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,500 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:14:15,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:14:15,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:15,551 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:15,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:15,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:14:16,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:14:16,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:14:16,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:14:16,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 15:14:16,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3864171] [2022-12-14 15:14:16,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:14:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 15:14:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 15:14:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:14:16,100 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:14:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:16,346 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2022-12-14 15:14:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 15:14:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 147 [2022-12-14 15:14:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:16,347 INFO L225 Difference]: With dead ends: 247 [2022-12-14 15:14:16,347 INFO L226 Difference]: Without dead ends: 198 [2022-12-14 15:14:16,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:14:16,350 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:16,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:14:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-14 15:14:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-12-14 15:14:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0304568527918783) internal successors, (203), 197 states have internal predecessors, (203), 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) [2022-12-14 15:14:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2022-12-14 15:14:16,358 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 147 [2022-12-14 15:14:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:16,358 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2022-12-14 15:14:16,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:14:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2022-12-14 15:14:16,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 15:14:16,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:16,360 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:14:16,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:14:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:16,562 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1977120868, now seen corresponding path program 9 times [2022-12-14 15:14:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:16,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052423957] [2022-12-14 15:14:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:16,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:14:22,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052423957] [2022-12-14 15:14:22,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052423957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525471326] [2022-12-14 15:14:22,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:14:22,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:22,163 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:22,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:14:22,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:14:22,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:14:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 15:14:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:14:22,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:14:29,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525471326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761037919] [2022-12-14 15:14:29,618 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:14:29,618 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:29,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:29,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:29,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,739 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:14:29,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:14:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:14:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:14:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:29,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:29,912 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:14:29,913 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 520 treesize of output 488 [2022-12-14 15:14:30,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,016 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:14:30,016 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 [2022-12-14 15:14:30,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,042 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,069 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:30,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,099 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,116 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,142 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:30,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,174 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,226 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:30,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,260 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,278 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:14:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,310 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:14:30,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:14:30,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:14:30,348 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:14:30,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:14:30,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:14:32,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:14:32,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:14:32,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:14:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 15:14:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331054404] [2022-12-14 15:14:32,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:14:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 15:14:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 15:14:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:14:32,337 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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) [2022-12-14 15:14:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:32,672 INFO L93 Difference]: Finished difference Result 396 states and 506 transitions. [2022-12-14 15:14:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 15:14:32,673 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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 196 [2022-12-14 15:14:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:32,674 INFO L225 Difference]: With dead ends: 396 [2022-12-14 15:14:32,674 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 15:14:32,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 458 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:14:32,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:32,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:14:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 15:14:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-12-14 15:14:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 298 states have internal predecessors, (304), 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) [2022-12-14 15:14:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2022-12-14 15:14:32,685 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 196 [2022-12-14 15:14:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:32,685 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2022-12-14 15:14:32,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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) [2022-12-14 15:14:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2022-12-14 15:14:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-12-14 15:14:32,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:32,688 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:14:32,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:14:32,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:32,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1554822591, now seen corresponding path program 10 times [2022-12-14 15:14:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:32,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413955054] [2022-12-14 15:14:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:14:53,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413955054] [2022-12-14 15:14:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413955054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605844823] [2022-12-14 15:14:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:14:53,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:53,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:14:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 4138 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 15:14:54,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:14:54,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:15:23,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605844823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:15:23,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615108467] [2022-12-14 15:15:23,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:15:23,992 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:15:23,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:15:23,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:15:23,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:15:24,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,099 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:15:24,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:15:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,227 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:15:24,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:15:24,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:15:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:15:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,409 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:15:24,410 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 500 treesize of output 490 [2022-12-14 15:15:24,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,852 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:15:24,853 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 [2022-12-14 15:15:24,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:15:24,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:15:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,943 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:15:24,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:15:24,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:24,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:15:24,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:15:25,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,016 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:15:25,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:15:25,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,050 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:15:25,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:15:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,081 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:15:25,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:15:25,100 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:15:25,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:15:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,151 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:15:25,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:15:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,190 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:15:25,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:15:25,205 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:15:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:15:25,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,270 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:15:25,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:15:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:15:25,312 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:15:25,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:15:25,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:15:26,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11211#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:15:26,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:15:26,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:15:26,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 15:15:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862849538] [2022-12-14 15:15:26,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:15:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 15:15:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 15:15:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:15:26,087 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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) [2022-12-14 15:15:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:27,643 INFO L93 Difference]: Finished difference Result 598 states and 809 transitions. [2022-12-14 15:15:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 15:15:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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 297 [2022-12-14 15:15:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:27,645 INFO L225 Difference]: With dead ends: 598 [2022-12-14 15:15:27,645 INFO L226 Difference]: Without dead ends: 501 [2022-12-14 15:15:27,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:15:27,652 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:27,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:15:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-12-14 15:15:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-12-14 15:15:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.012) internal successors, (506), 500 states have internal predecessors, (506), 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) [2022-12-14 15:15:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 506 transitions. [2022-12-14 15:15:27,671 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 506 transitions. Word has length 297 [2022-12-14 15:15:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:27,672 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 506 transitions. [2022-12-14 15:15:27,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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) [2022-12-14 15:15:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 506 transitions. [2022-12-14 15:15:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-12-14 15:15:27,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:27,683 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:27,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:15:27,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:27,884 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash -35790047, now seen corresponding path program 11 times [2022-12-14 15:15:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:27,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830927626] [2022-12-14 15:15:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 15:16:51,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:51,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830927626] [2022-12-14 15:16:51,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830927626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:51,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439459357] [2022-12-14 15:16:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:16:51,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:51,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:51,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:22:11,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 15:22:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 15:22:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 22 proven. 253 refuted. 0 times theorem prover too weak. 81740 trivial. 0 not checked. [2022-12-14 15:22:14,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81762 trivial. 0 not checked. [2022-12-14 15:22:17,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439459357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:22:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267888268] [2022-12-14 15:22:17,147 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:22:17,147 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:22:17,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:22:17,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:22:17,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:22:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,250 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:22:17,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:22:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-12-14 15:22:17,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:22:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:22:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,420 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:22:17,420 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 520 treesize of output 488 [2022-12-14 15:22:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,523 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:22:17,523 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 [2022-12-14 15:22:17,543 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:22:17,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:22:17,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,582 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:22:17,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:22:17,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,624 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:22:17,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:22:17,638 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:22:17,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:22:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,681 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:22:17,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:22:17,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,727 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:22:17,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:22:17,743 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:22:17,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:22:17,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,798 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:22:17,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:22:17,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:22:17,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:22:17,856 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:22:17,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:22:17,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,907 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:22:17,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:22:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:22:17,971 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:22:17,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:22:17,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:22:19,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16840#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:22:19,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:22:19,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:22:19,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 25] total 452 [2022-12-14 15:22:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347631252] [2022-12-14 15:22:19,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:22:19,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2022-12-14 15:22:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:22:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2022-12-14 15:22:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83005, Invalid=125387, Unknown=0, NotChecked=0, Total=208392 [2022-12-14 15:22:19,283 INFO L87 Difference]: Start difference. First operand 501 states and 506 transitions. Second operand has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 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) [2022-12-14 15:22:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:22,101 INFO L93 Difference]: Finished difference Result 695 states and 801 transitions. [2022-12-14 15:22:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2022-12-14 15:22:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 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 499 [2022-12-14 15:22:22,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:22,106 INFO L225 Difference]: With dead ends: 695 [2022-12-14 15:22:22,106 INFO L226 Difference]: Without dead ends: 598 [2022-12-14 15:22:22,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1899 GetRequests, 1444 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21359 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=83005, Invalid=125387, Unknown=0, NotChecked=0, Total=208392 [2022-12-14 15:22:22,114 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:22,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:22:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-14 15:22:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-12-14 15:22:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0100502512562815) internal successors, (603), 597 states have internal predecessors, (603), 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) [2022-12-14 15:22:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 603 transitions. [2022-12-14 15:22:22,129 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 603 transitions. Word has length 499 [2022-12-14 15:22:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:22,130 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 603 transitions. [2022-12-14 15:22:22,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 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) [2022-12-14 15:22:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 603 transitions. [2022-12-14 15:22:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-12-14 15:22:22,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:22,133 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:22:22,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:22:22,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:22:22,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1205473692, now seen corresponding path program 12 times [2022-12-14 15:22:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:22:22,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029063800] [2022-12-14 15:22:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:22,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:22:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:23:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 15:23:59,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:23:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029063800] [2022-12-14 15:23:59,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029063800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:23:59,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119254147] [2022-12-14 15:23:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:23:59,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:23:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:23:59,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:23:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:24:00,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:24:00,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:24:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 8261 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 15:24:00,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 15:24:01,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 15:25:59,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119254147] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:59,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526890885] [2022-12-14 15:25:59,292 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 15:25:59,292 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:25:59,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:25:59,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:25:59,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:25:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,395 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-12-14 15:25:59,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-12-14 15:25:59,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,519 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-12-14 15:25:59,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-12-14 15:25:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 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 [2022-12-14 15:25:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:25:59,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,686 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:25:59,686 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 520 treesize of output 488 [2022-12-14 15:25:59,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,785 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:25:59,785 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 [2022-12-14 15:25:59,812 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:25:59,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:25:59,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,870 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:25:59,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-12-14 15:25:59,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,914 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:25:59,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:25:59,928 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:25:59,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:25:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:25:59,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,006 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:26:00,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:26:00,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,046 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:00,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:26:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:00,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:26:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:26:00,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,091 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:26:00,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-12-14 15:26:00,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,120 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:00,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:26:00,135 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:26:00,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:26:00,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,190 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:26:00,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-12-14 15:26:00,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:26:00,229 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:26:00,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:26:00,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:26:01,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23798#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:26:01,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:26:01,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:26:01,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 15:26:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754314179] [2022-12-14 15:26:01,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 15:26:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:26:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 15:26:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 15:26:01,632 INFO L87 Difference]: Start difference. First operand 598 states and 603 transitions. Second operand has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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) [2022-12-14 15:26:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:13,795 INFO L93 Difference]: Finished difference Result 1196 states and 1610 transitions. [2022-12-14 15:26:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 15:26:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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 596 [2022-12-14 15:26:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:13,798 INFO L225 Difference]: With dead ends: 1196 [2022-12-14 15:26:13,798 INFO L226 Difference]: Without dead ends: 1003 [2022-12-14 15:26:13,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2191 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 160.2s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 15:26:13,825 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:13,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:26:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-12-14 15:26:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-12-14 15:26:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.0059880239520957) internal successors, (1008), 1002 states have internal predecessors, (1008), 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) [2022-12-14 15:26:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1008 transitions. [2022-12-14 15:26:13,847 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1008 transitions. Word has length 596 [2022-12-14 15:26:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:13,848 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1008 transitions. [2022-12-14 15:26:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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) [2022-12-14 15:26:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1008 transitions. [2022-12-14 15:26:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2022-12-14 15:26:13,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:13,855 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:26:13,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:26:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_861617bb-f850-4a8e-90da-78bd2f1e0c88/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:26:14,056 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:26:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 697596737, now seen corresponding path program 13 times [2022-12-14 15:26:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:26:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149108400] [2022-12-14 15:26:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:26:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat