./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba --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 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- 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-b5237d8 [2022-11-22 00:12:53,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:12:53,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:12:53,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:12:53,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:12:53,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:12:53,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:12:53,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:12:53,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:12:53,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:12:53,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:12:53,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:12:53,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:12:53,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:12:53,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:12:53,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:12:53,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:12:53,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:12:53,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:12:53,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:12:53,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:12:53,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:12:53,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:12:53,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:12:53,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:12:53,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:12:53,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:12:53,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:12:53,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:12:53,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:12:53,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:12:53,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:12:53,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:12:53,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:12:53,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:12:53,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:12:53,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:12:53,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:12:53,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:12:53,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:12:53,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:12:53,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:12:53,614 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:12:53,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:12:53,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:12:53,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:12:53,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:12:53,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:12:53,624 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:12:53,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:12:53,625 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:12:53,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:12:53,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:12:53,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:12:53,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:12:53,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:12:53,627 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:12:53,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:12:53,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:12:53,628 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:12:53,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:12:53,629 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:12:53,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:12:53,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:12:53,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:12:53,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:12:53,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:12:53,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:12:53,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:12:53,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:12:53,631 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:12:53,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:12:53,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:12:53,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:12:53,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:12:53,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:12:53,632 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:12:53,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:12:53,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:12:53,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:12:53,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:12:53,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:12:53,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:12:53,634 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_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-11-22 00:12:53,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:12:54,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:12:54,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:12:54,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:12:54,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:12:54,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-22 00:12:57,079 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:12:57,335 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:12:57,336 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-22 00:12:57,342 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/data/6396d268e/9e824d2fe30947de8c96e458d303efa7/FLAG224d44c46 [2022-11-22 00:12:57,357 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/data/6396d268e/9e824d2fe30947de8c96e458d303efa7 [2022-11-22 00:12:57,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:12:57,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:12:57,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:12:57,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:12:57,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:12:57,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcf795e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57, skipping insertion in model container [2022-11-22 00:12:57,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:12:57,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:12:57,556 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_50020874-b83d-4fa4-a9a7-2a622d490d2e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-22 00:12:57,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:12:57,617 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:12:57,627 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_50020874-b83d-4fa4-a9a7-2a622d490d2e/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-22 00:12:57,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:12:57,650 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:12:57,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57 WrapperNode [2022-11-22 00:12:57,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:12:57,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:12:57,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:12:57,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:12:57,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,700 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-22 00:12:57,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:12:57,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:12:57,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:12:57,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:12:57,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:12:57,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:12:57,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:12:57,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:12:57,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (1/1) ... [2022-11-22 00:12:57,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:12:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:57,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:12:57,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:12:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:12:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:12:57,822 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:12:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:12:57,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:12:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:12:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:12:57,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:12:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:12:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:12:57,883 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:12:57,885 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:12:58,035 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:12:58,079 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:12:58,079 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 00:12:58,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:12:58 BoogieIcfgContainer [2022-11-22 00:12:58,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:12:58,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:12:58,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:12:58,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:12:58,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:12:57" (1/3) ... [2022-11-22 00:12:58,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd474d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:12:58, skipping insertion in model container [2022-11-22 00:12:58,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:57" (2/3) ... [2022-11-22 00:12:58,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd474d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:12:58, skipping insertion in model container [2022-11-22 00:12:58,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:12:58" (3/3) ... [2022-11-22 00:12:58,099 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-11-22 00:12:58,118 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:12:58,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:12:58,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:12:58,174 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;@3c025166, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:12:58,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:12:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:12:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:12:58,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:58,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:12:58,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-11-22 00:12:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461789252] [2022-11-22 00:12:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:58,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:12:58,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461789252] [2022-11-22 00:12:58,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461789252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:58,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:58,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:12:58,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377732516] [2022-11-22 00:12:58,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:58,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:12:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:12:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:12:58,656 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:12:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:58,754 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-22 00:12:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:12:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 00:12:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:58,763 INFO L225 Difference]: With dead ends: 27 [2022-11-22 00:12:58,763 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 00:12:58,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:12:58,770 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:58,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:12:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 00:12:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-22 00:12:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:12:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-22 00:12:58,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-11-22 00:12:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:58,819 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-22 00:12:58,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:12:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-22 00:12:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 00:12:58,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:58,821 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:58,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:12:58,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-11-22 00:12:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:58,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592957707] [2022-11-22 00:12:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:12:59,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:59,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592957707] [2022-11-22 00:12:59,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592957707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:59,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:59,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029392562] [2022-11-22 00:12:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:59,127 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:12:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:59,222 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-22 00:12:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:12:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-22 00:12:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:59,226 INFO L225 Difference]: With dead ends: 25 [2022-11-22 00:12:59,226 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 00:12:59,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:59,228 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:59,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:12:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 00:12:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-22 00:12:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 00:12:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-22 00:12:59,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-11-22 00:12:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:59,249 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-22 00:12:59,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 00:12:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-22 00:12:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 00:12:59,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:59,250 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:59,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:12:59,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-11-22 00:12:59,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904873033] [2022-11-22 00:12:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:12:59,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904873033] [2022-11-22 00:12:59,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904873033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:59,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108843284] [2022-11-22 00:12:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:59,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:59,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:59,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:12:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:12:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:12:59,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:12:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:12:59,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108843284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:12:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1201032678] [2022-11-22 00:12:59,776 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:12:59,776 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:12:59,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:12:59,796 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:12:59,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:12:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:12:59,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:12:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,094 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 00:13:00,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-22 00:13:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-22 00:13:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:00,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:13:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:04,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:04,563 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:13:04,564 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 573 treesize of output 539 [2022-11-22 00:13:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:09,090 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:09,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:09,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:09,333 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:09,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:09,435 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-22 00:13:09,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-22 00:13:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:09,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:09,517 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:09,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:09,610 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-22 00:13:09,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:13:10,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 00:13:10,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:13:10,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:13:10,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-22 00:13:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705847470] [2022-11-22 00:13:10,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:13:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:13:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:13:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:13:10,182 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:13:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:10,349 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-22 00:13:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:13:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-11-22 00:13:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:10,351 INFO L225 Difference]: With dead ends: 52 [2022-11-22 00:13:10,351 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 00:13:10,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:13:10,353 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:10,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:13:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 00:13:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-11-22 00:13:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-22 00:13:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-11-22 00:13:10,363 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-11-22 00:13:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:10,363 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-11-22 00:13:10,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:13:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-11-22 00:13:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 00:13:10,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:10,366 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:10,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:13:10,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:10,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-11-22 00:13:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935417395] [2022-11-22 00:13:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:10,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-22 00:13:10,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935417395] [2022-11-22 00:13:10,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935417395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352323803] [2022-11-22 00:13:10,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:13:10,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:10,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:10,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:13:11,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:13:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:13:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:13:11,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-22 00:13:11,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:13:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-22 00:13:11,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352323803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:13:11,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595526544] [2022-11-22 00:13:11,338 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:13:11,338 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:13:11,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:13:11,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:13:11,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:13:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,475 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-22 00:13:11,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-22 00:13:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:11,641 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 00:13:11,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-22 00:13:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:12,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:13:14,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:14,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:14,597 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:13:14,597 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 573 treesize of output 539 [2022-11-22 00:13:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:17,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,606 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:17,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,836 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:17,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,923 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:17,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:17,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:17,991 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:17,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:18,096 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-22 00:13:18,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:13:18,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 00:13:18,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:13:18,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:13:18,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-11-22 00:13:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994179696] [2022-11-22 00:13:18,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:13:18,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 00:13:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 00:13:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:13:18,766 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-22 00:13:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:19,218 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-22 00:13:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:13:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-11-22 00:13:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:19,225 INFO L225 Difference]: With dead ends: 121 [2022-11-22 00:13:19,225 INFO L226 Difference]: Without dead ends: 111 [2022-11-22 00:13:19,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 00:13:19,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 203 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:19,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 42 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:13:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-22 00:13:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-11-22 00:13:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-22 00:13:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-11-22 00:13:19,260 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-11-22 00:13:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:19,261 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-11-22 00:13:19,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-22 00:13:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-11-22 00:13:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-22 00:13:19,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:19,268 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:19,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:19,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-11-22 00:13:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:19,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136331599] [2022-11-22 00:13:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-22 00:13:20,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136331599] [2022-11-22 00:13:20,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136331599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303902114] [2022-11-22 00:13:20,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:13:20,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:20,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:20,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:13:22,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:13:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:13:22,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:13:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-22 00:13:22,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:13:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-22 00:13:22,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303902114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:13:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445152670] [2022-11-22 00:13:22,937 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:13:22,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:13:22,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:13:22,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:13:22,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:13:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:22,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,086 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 00:13:23,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-22 00:13:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-22 00:13:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:23,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-22 00:13:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:25,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:25,853 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 00:13:25,854 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 623 treesize of output 537 [2022-11-22 00:13:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:27,129 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:27,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:27,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:27,815 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:27,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:27,910 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-22 00:13:27,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-22 00:13:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:27,976 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:27,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:28,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-22 00:13:28,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:13:29,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 00:13:29,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:13:29,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:13:29,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-22 00:13:29,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530713206] [2022-11-22 00:13:29,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:13:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 00:13:29,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 00:13:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 00:13:29,224 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-22 00:13:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:30,210 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-11-22 00:13:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:13:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-11-22 00:13:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:30,220 INFO L225 Difference]: With dead ends: 259 [2022-11-22 00:13:30,220 INFO L226 Difference]: Without dead ends: 243 [2022-11-22 00:13:30,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 00:13:30,223 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 490 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:30,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 84 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:13:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-22 00:13:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-11-22 00:13:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-22 00:13:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-11-22 00:13:30,279 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-11-22 00:13:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:30,280 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-11-22 00:13:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-22 00:13:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-11-22 00:13:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-22 00:13:30,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:30,296 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:30,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:30,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:30,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:30,506 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-11-22 00:13:30,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:30,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17914030] [2022-11-22 00:13:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:30,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-22 00:13:32,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17914030] [2022-11-22 00:13:32,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17914030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501230787] [2022-11-22 00:13:32,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:13:32,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:32,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:32,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:13:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 00:13:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-22 00:13:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:13:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-22 00:13:35,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501230787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:13:35,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128319835] [2022-11-22 00:13:35,027 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:13:35,027 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:13:35,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:13:35,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:13:35,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:13:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,126 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-22 00:13:35,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-22 00:13:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,257 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 00:13:35,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-22 00:13:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:35,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:13:37,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:37,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:37,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:37,715 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:13:37,715 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 573 treesize of output 539 [2022-11-22 00:13:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:41,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:41,667 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:41,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:13:42,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:42,382 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:13:42,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:13:42,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:42,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:42,470 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:42,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:42,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:13:42,541 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:13:42,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:13:42,758 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-22 00:13:42,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:13:44,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 00:13:44,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:13:44,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:13:44,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-22 00:13:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344235813] [2022-11-22 00:13:44,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:13:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-22 00:13:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-22 00:13:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-11-22 00:13:44,327 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-22 00:13:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:46,855 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-11-22 00:13:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 00:13:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-11-22 00:13:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:46,860 INFO L225 Difference]: With dead ends: 535 [2022-11-22 00:13:46,860 INFO L226 Difference]: Without dead ends: 507 [2022-11-22 00:13:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-11-22 00:13:46,865 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1248 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:46,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 174 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:13:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-22 00:13:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-11-22 00:13:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-22 00:13:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-11-22 00:13:46,921 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-11-22 00:13:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:46,922 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-11-22 00:13:46,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-22 00:13:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-11-22 00:13:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-22 00:13:46,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:46,940 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:46,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:47,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:13:47,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-11-22 00:13:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:47,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335964435] [2022-11-22 00:13:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-11-22 00:13:52,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335964435] [2022-11-22 00:13:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335964435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030266438] [2022-11-22 00:13:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:13:52,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:52,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:52,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:15:39,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-22 00:15:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:15:39,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-22 00:15:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:15:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 226 proven. 1081 refuted. 0 times theorem prover too weak. 23901 trivial. 0 not checked. [2022-11-22 00:15:42,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:15:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 23856 trivial. 0 not checked. [2022-11-22 00:15:46,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030266438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:15:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109937841] [2022-11-22 00:15:46,128 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 00:15:46,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:15:46,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:15:46,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:15:46,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:15:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,247 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-22 00:15:46,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-22 00:15:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,378 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-22 00:15:46,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-22 00:15:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 00:15:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:48,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:48,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:48,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:48,955 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 00:15:48,955 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 573 treesize of output 539 [2022-11-22 00:15:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:51,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,586 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:15:51,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:15:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:15:51,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,794 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-22 00:15:51,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-22 00:15:51,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,870 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:15:51,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:15:51,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:15:51,937 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-22 00:15:51,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 00:15:52,036 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-22 00:15:52,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:15:55,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9159#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 00:15:55,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:15:55,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:15:55,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 53] total 150 [2022-11-22 00:15:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251459291] [2022-11-22 00:15:55,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:15:55,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-22 00:15:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:15:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-22 00:15:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10283, Invalid=15157, Unknown=0, NotChecked=0, Total=25440 [2022-11-22 00:15:55,345 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-22 00:16:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:05,609 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-11-22 00:16:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-22 00:16:05,610 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) Word has length 558 [2022-11-22 00:16:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:05,617 INFO L225 Difference]: With dead ends: 1087 [2022-11-22 00:16:05,617 INFO L226 Difference]: Without dead ends: 1035 [2022-11-22 00:16:05,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1516 SyntacticMatches, 47 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29021 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=15205, Invalid=27025, Unknown=0, NotChecked=0, Total=42230 [2022-11-22 00:16:05,628 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2660 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 3605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3605 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:05,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 375 Invalid, 6294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3605 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 00:16:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-22 00:16:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-11-22 00:16:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-22 00:16:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-11-22 00:16:05,698 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-11-22 00:16:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:05,700 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-11-22 00:16:05,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-22 00:16:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-11-22 00:16:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-11-22 00:16:05,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:05,752 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:05,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 00:16:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:16:05,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-11-22 00:16:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:05,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790916677] [2022-11-22 00:16:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-11-22 00:16:23,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790916677] [2022-11-22 00:16:23,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790916677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:23,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343721942] [2022-11-22 00:16:23,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:16:23,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:23,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:23,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:23,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50020874-b83d-4fa4-a9a7-2a622d490d2e/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process