./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:33:19,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:33:19,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:33:19,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:33:19,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:33:19,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:33:19,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:33:19,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:33:19,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:33:19,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:33:19,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:33:19,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:33:19,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:33:19,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:33:19,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:33:19,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:33:19,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:33:19,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:33:19,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:33:19,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:33:19,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:33:19,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:33:19,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:33:19,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:33:19,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:33:19,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:33:19,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:33:19,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:33:19,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:33:19,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:33:19,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:33:19,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:33:19,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:33:19,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:33:19,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:33:19,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:33:19,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:33:19,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:33:19,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:33:19,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:33:19,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:33:19,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:33:19,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:33:19,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:33:19,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:33:19,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:33:19,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:33:19,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:33:19,686 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:33:19,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:33:19,686 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:33:19,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:33:19,688 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:33:19,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:33:19,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:33:19,688 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:33:19,689 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:33:19,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:33:19,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:33:19,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:33:19,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:33:19,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:33:19,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:33:19,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:33:19,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:33:19,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:33:19,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:33:19,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:33:19,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:33:19,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:33:19,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:33:19,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:33:19,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:33:19,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:33:19,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:19,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:33:19,695 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:33:19,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:33:19,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:33:19,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:33:19,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:33:19,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:33:19,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:33:19,697 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_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a66002bd28db929747d199b9986ccd34ccce90ecf5386b8e2342838dba13a02 [2022-11-23 15:33:20,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:33:20,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:33:20,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:33:20,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:33:20,084 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:33:20,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2022-11-23 15:33:23,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:33:23,398 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:33:23,399 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i [2022-11-23 15:33:23,405 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/data/097bf0508/e5ec3c13c2be4250a7bcfae2ccd20200/FLAG79f77a80a [2022-11-23 15:33:23,420 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/data/097bf0508/e5ec3c13c2be4250a7bcfae2ccd20200 [2022-11-23 15:33:23,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:33:23,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:33:23,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:23,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:33:23,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:33:23,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1a046f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23, skipping insertion in model container [2022-11-23 15:33:23,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:33:23,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:33:23,663 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_a351f602-6f80-43d1-b580-f869e0ec6fbc/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2022-11-23 15:33:23,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:23,689 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:33:23,701 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_a351f602-6f80-43d1-b580-f869e0ec6fbc/sv-benchmarks/c/array-examples/standard_copy4_ground-2.i[816,829] [2022-11-23 15:33:23,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:23,727 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:33:23,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23 WrapperNode [2022-11-23 15:33:23,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:23,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:23,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:33:23,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:33:23,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,764 INFO L138 Inliner]: procedures = 16, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 115 [2022-11-23 15:33:23,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:23,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:33:23,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:33:23,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:33:23,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:33:23,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:33:23,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:33:23,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:33:23,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (1/1) ... [2022-11-23 15:33:23,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:23,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:33:23,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:33:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:33:23,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:33:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:33:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:33:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:33:23,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:33:23,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:33:23,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:33:23,946 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:33:23,948 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:33:24,184 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:33:24,245 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:33:24,246 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 15:33:24,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:24 BoogieIcfgContainer [2022-11-23 15:33:24,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:33:24,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:33:24,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:33:24,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:33:24,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:23" (1/3) ... [2022-11-23 15:33:24,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c61047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:24, skipping insertion in model container [2022-11-23 15:33:24,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:23" (2/3) ... [2022-11-23 15:33:24,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c61047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:24, skipping insertion in model container [2022-11-23 15:33:24,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:24" (3/3) ... [2022-11-23 15:33:24,258 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2022-11-23 15:33:24,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:33:24,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:33:24,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:33:24,362 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;@772be249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:33:24,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:33:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:33:24,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:24,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:24,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1787872001, now seen corresponding path program 1 times [2022-11-23 15:33:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:24,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606296743] [2022-11-23 15:33:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:24,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:24,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606296743] [2022-11-23 15:33:24,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606296743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:24,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:24,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:24,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821946996] [2022-11-23 15:33:24,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:24,797 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:24,851 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-23 15:33:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:33:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:24,860 INFO L225 Difference]: With dead ends: 23 [2022-11-23 15:33:24,860 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 15:33:24,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:33:24,867 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:24,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 15:33:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 15:33:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-23 15:33:24,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2022-11-23 15:33:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:24,898 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-23 15:33:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-23 15:33:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:33:24,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:24,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:24,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:33:24,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:24,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:24,902 INFO L85 PathProgramCache]: Analyzing trace with hash -582588356, now seen corresponding path program 1 times [2022-11-23 15:33:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213786022] [2022-11-23 15:33:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:33:25,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213786022] [2022-11-23 15:33:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213786022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:25,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528287237] [2022-11-23 15:33:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:25,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:25,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:25,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:25,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:33:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:33:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:33:25,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:25,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528287237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:25,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:25,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 15:33:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503266113] [2022-11-23 15:33:25,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:25,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:33:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:33:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:25,207 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:25,250 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-23 15:33:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:33:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 15:33:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:25,255 INFO L225 Difference]: With dead ends: 24 [2022-11-23 15:33:25,255 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:33:25,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:25,264 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:25,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:33:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:33:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-23 15:33:25,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-23 15:33:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:25,278 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-23 15:33:25,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-23 15:33:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:33:25,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:25,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:25,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:33:25,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 15:33:25,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1744700016, now seen corresponding path program 1 times [2022-11-23 15:33:25,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:25,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050330510] [2022-11-23 15:33:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:25,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:25,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050330510] [2022-11-23 15:33:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050330510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110469807] [2022-11-23 15:33:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:25,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:25,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:33:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:25,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:33:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:25,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:33:25,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110469807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1610100077] [2022-11-23 15:33:25,888 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:25,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:25,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:25,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:25,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,312 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:26,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:26,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:33:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:33:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:26,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:26,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:26,980 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:33:26,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:33:27,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:27,912 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:27,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:27,960 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:27,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,078 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:28,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:28,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,215 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:28,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,316 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:28,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:28,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,412 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,447 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,510 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:28,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,561 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,592 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:28,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,646 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:28,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:28,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:28,714 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:28,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:28,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:29,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:29,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:29,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:29,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 15:33:29,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793784885] [2022-11-23 15:33:29,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:33:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:33:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:33:29,046 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:29,091 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-11-23 15:33:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:33:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:29,092 INFO L225 Difference]: With dead ends: 32 [2022-11-23 15:33:29,093 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 15:33:29,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:33:29,094 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:29,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 15:33:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 15:33:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-23 15:33:29,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2022-11-23 15:33:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:29,099 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-23 15:33:29,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-23 15:33:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:33:29,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:29,101 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:29,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:29,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:29,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:29,307 INFO L85 PathProgramCache]: Analyzing trace with hash 158008469, now seen corresponding path program 2 times [2022-11-23 15:33:29,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:29,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598763068] [2022-11-23 15:33:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:33:29,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598763068] [2022-11-23 15:33:29,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598763068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371680906] [2022-11-23 15:33:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:33:29,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:29,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:29,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:33:29,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:33:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:33:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:33:29,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:33:29,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371680906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534989109] [2022-11-23 15:33:29,659 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:29,659 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:29,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:29,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:29,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,845 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:33:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:33:29,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,099 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:30,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:33:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,439 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:33:30,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 520 treesize of output 488 [2022-11-23 15:33:30,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,616 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:30,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:30,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:30,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,721 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:30,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:30,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,769 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:30,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,796 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:30,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,863 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:30,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:30,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,906 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:30,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:30,935 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:30,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:30,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:31,033 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:31,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:31,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:31,123 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:31,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:31,150 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:31,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:31,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:31,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:31,237 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:31,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:31,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:31,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:31,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:31,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:31,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:31,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:31,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:31,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:33:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911609836] [2022-11-23 15:33:31,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:31,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:33:31,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:33:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:33:31,670 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:31,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:31,759 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-11-23 15:33:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:31,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 15:33:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:31,761 INFO L225 Difference]: With dead ends: 42 [2022-11-23 15:33:31,761 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 15:33:31,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:33:31,762 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:31,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 15:33:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 15:33:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-23 15:33:31,768 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-11-23 15:33:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:31,768 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-23 15:33:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-23 15:33:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:33:31,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:31,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:31,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:33:31,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:31,977 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 148958273, now seen corresponding path program 3 times [2022-11-23 15:33:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:31,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728618670] [2022-11-23 15:33:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:32,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728618670] [2022-11-23 15:33:32,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728618670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:32,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438786287] [2022-11-23 15:33:32,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:33:32,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:32,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:32,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:33:32,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:33:32,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:32,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:32,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438786287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726797417] [2022-11-23 15:33:32,480 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:32,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:32,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:32,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:32,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,709 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:32,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:33:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:33:32,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,068 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:33:33,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:33:33,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,758 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:33,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:33,788 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:33,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:33,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,867 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:33,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:33,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,934 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:33,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:33,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:33,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:34,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,018 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:34,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:34,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:34,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:34,092 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:34,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:34,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,171 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:34,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,261 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:34,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:34,291 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:34,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,381 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:34,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:34,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:34,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:34,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:34,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:34,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:34,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:34,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:34,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:33:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829871298] [2022-11-23 15:33:34,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:33:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:33:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:33:34,708 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:34,759 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-23 15:33:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:33:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 15:33:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:34,760 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:33:34,760 INFO L226 Difference]: Without dead ends: 37 [2022-11-23 15:33:34,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:33:34,761 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:34,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-23 15:33:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-23 15:33:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-23 15:33:34,766 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2022-11-23 15:33:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:34,767 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-23 15:33:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-23 15:33:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:33:34,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:34,768 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:34,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:34,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:34,974 INFO L85 PathProgramCache]: Analyzing trace with hash -747926943, now seen corresponding path program 4 times [2022-11-23 15:33:34,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:34,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122360992] [2022-11-23 15:33:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:35,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122360992] [2022-11-23 15:33:35,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122360992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654451687] [2022-11-23 15:33:35,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:33:35,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:35,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:35,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:35,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:33:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 15:33:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:35,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654451687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168867624] [2022-11-23 15:33:35,780 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:35,780 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:35,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:35,781 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:35,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:35,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:35,997 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:35,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:33:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:33:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:36,320 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:33:36,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:33:36,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:36,960 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:36,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:36,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:36,999 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:37,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,044 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:37,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,083 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,154 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:37,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,193 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,217 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:37,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,293 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:37,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,362 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,386 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:37,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:37,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,479 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:37,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:37,565 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:37,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:37,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:37,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:37,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:37,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:37,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 15:33:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204594402] [2022-11-23 15:33:37,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:37,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 15:33:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 15:33:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:33:37,837 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:37,952 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-11-23 15:33:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 15:33:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-23 15:33:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:37,955 INFO L225 Difference]: With dead ends: 74 [2022-11-23 15:33:37,955 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 15:33:37,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:33:37,956 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:37,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 15:33:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-23 15:33:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-23 15:33:37,963 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-11-23 15:33:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:37,963 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-23 15:33:37,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:37,963 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-23 15:33:37,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:33:37,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:37,964 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:38,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:38,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1111654751, now seen corresponding path program 5 times [2022-11-23 15:33:38,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207861852] [2022-11-23 15:33:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:38,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:33:39,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207861852] [2022-11-23 15:33:39,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207861852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855431575] [2022-11-23 15:33:39,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:33:39,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:39,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:39,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:39,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:33:39,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:33:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-23 15:33:39,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-23 15:33:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855431575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73768243] [2022-11-23 15:33:39,517 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:39,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:39,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:39,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:39,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:39,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,679 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:33:39,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:33:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,886 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:39,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:39,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:39,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:33:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:40,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,219 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:33:40,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:33:40,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,726 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:40,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:40,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,755 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:40,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:40,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,799 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:40,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:40,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:40,867 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:40,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:40,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:40,966 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:40,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:41,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,042 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:41,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:41,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,071 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:41,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:41,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,114 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:41,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,154 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:41,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:41,192 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:41,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,293 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:41,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:41,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:41,365 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:41,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:41,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:41,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:41,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:41,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:41,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 15:33:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449784154] [2022-11-23 15:33:41,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:41,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 15:33:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 15:33:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:33:41,703 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:41,905 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-11-23 15:33:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:33:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-23 15:33:41,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:41,908 INFO L225 Difference]: With dead ends: 99 [2022-11-23 15:33:41,908 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 15:33:41,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 15:33:41,909 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:41,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:33:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 15:33:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 15:33:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-11-23 15:33:41,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 47 [2022-11-23 15:33:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:41,917 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-11-23 15:33:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-11-23 15:33:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 15:33:41,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:41,919 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:41,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:42,119 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 851470940, now seen corresponding path program 6 times [2022-11-23 15:33:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087437687] [2022-11-23 15:33:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:43,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:43,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087437687] [2022-11-23 15:33:43,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087437687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:43,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657766791] [2022-11-23 15:33:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:33:43,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:43,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:43,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:33:43,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:33:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:33:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:33:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:43,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:44,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657766791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:44,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842420489] [2022-11-23 15:33:44,271 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:44,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:44,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:44,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:44,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,446 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:33:44,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:33:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,655 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:44,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:33:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:44,912 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:33:44,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 520 treesize of output 488 [2022-11-23 15:33:45,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,038 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:45,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:45,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,074 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:45,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,116 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:45,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,184 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,214 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,269 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:45,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:45,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,309 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,334 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:45,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:45,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,435 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:45,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:45,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,496 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,521 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:45,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:45,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,594 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:33:45,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:33:45,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:45,678 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:45,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:45,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:46,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:46,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:46,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:46,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 15:33:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596260174] [2022-11-23 15:33:46,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 15:33:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 15:33:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:33:46,087 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:46,255 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2022-11-23 15:33:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 15:33:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-23 15:33:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:46,257 INFO L225 Difference]: With dead ends: 148 [2022-11-23 15:33:46,257 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 15:33:46,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 15:33:46,259 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:46,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:33:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 15:33:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-23 15:33:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-11-23 15:33:46,273 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 72 [2022-11-23 15:33:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:46,275 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-11-23 15:33:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-11-23 15:33:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 15:33:46,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:46,278 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:46,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:46,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:33:46,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash 99824193, now seen corresponding path program 7 times [2022-11-23 15:33:46,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736653678] [2022-11-23 15:33:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:46,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:49,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736653678] [2022-11-23 15:33:49,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736653678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855420652] [2022-11-23 15:33:49,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:33:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:49,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:49,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:33:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:50,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:33:50,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:50,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:33:53,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855420652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:53,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095100468] [2022-11-23 15:33:53,272 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:33:53,272 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:33:53,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:33:53,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:33:53,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:33:53,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,470 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:33:53,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:33:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:33:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:33:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:53,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:53,747 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:33:53,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:33:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,341 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:33:54,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:33:54,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,370 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,418 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:54,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,483 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:54,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:54,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,559 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:54,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:54,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,632 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:33:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,705 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:33:54,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:33:54,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,768 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:33:54,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:33:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,834 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:33:54,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:33:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:33:54,904 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:33:54,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:33:54,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:33:55,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3711#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:33:55,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:33:55,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:33:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 15:33:55,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949609268] [2022-11-23 15:33:55,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:33:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 15:33:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 15:33:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:33:55,323 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:55,635 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2022-11-23 15:33:55,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 15:33:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-11-23 15:33:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:55,637 INFO L225 Difference]: With dead ends: 198 [2022-11-23 15:33:55,637 INFO L226 Difference]: Without dead ends: 149 [2022-11-23 15:33:55,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:33:55,640 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:55,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:33:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-23 15:33:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-23 15:33:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-11-23 15:33:55,651 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 97 [2022-11-23 15:33:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:55,652 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-11-23 15:33:55,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:33:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-11-23 15:33:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 15:33:55,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:55,654 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:55,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:55,870 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash -666219871, now seen corresponding path program 8 times [2022-11-23 15:33:55,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:55,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695352706] [2022-11-23 15:33:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:55,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:34:04,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695352706] [2022-11-23 15:34:04,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695352706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140513495] [2022-11-23 15:34:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:34:04,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:04,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:04,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:34:11,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 15:34:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:34:11,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 15:34:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-11-23 15:34:11,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 5006 trivial. 0 not checked. [2022-11-23 15:34:12,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140513495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:12,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079003320] [2022-11-23 15:34:12,443 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:34:12,443 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:12,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:12,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:12,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:12,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,593 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:34:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:34:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,823 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:34:12,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:34:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:12,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:34:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,075 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:34:13,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 520 treesize of output 488 [2022-11-23 15:34:13,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,214 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:34:13,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:34:13,248 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:13,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:13,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,318 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:34:13,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:34:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:13,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:13,407 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:13,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:13,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,486 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:34:13,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:34:13,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,568 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:13,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:13,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,592 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:13,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,632 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:13,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:34:13,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,671 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:13,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:13,693 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:34:13,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:34:13,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,779 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:34:13,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:34:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:13,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:13,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:13,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:14,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:14,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:14,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:14,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 15:34:14,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895665313] [2022-11-23 15:34:14,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:14,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 15:34:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 15:34:14,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:34:14,658 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:15,131 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2022-11-23 15:34:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 15:34:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-23 15:34:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:15,135 INFO L225 Difference]: With dead ends: 247 [2022-11-23 15:34:15,135 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 15:34:15,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-23 15:34:15,144 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:15,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:34:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 15:34:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-23 15:34:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0304568527918783) internal successors, (203), 197 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2022-11-23 15:34:15,179 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 147 [2022-11-23 15:34:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:15,180 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2022-11-23 15:34:15,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2022-11-23 15:34:15,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-23 15:34:15,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:15,190 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:15,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:15,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1977120868, now seen corresponding path program 9 times [2022-11-23 15:34:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:15,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117384996] [2022-11-23 15:34:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:34:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:34:23,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:34:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117384996] [2022-11-23 15:34:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117384996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:34:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618082985] [2022-11-23 15:34:23,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:34:23,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:23,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:34:23,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:34:23,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:34:24,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:34:24,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:34:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 15:34:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:34:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:34:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:34:36,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618082985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600205841] [2022-11-23 15:34:36,591 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:34:36,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:34:36,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:34:36,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:34:36,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:34:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,810 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:34:36,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:34:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:34:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:36,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:34:37,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,090 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:34:37,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 520 treesize of output 488 [2022-11-23 15:34:37,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,234 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:34:37,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:34:37,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,266 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,309 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:37,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:34:37,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,349 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,375 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,414 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:37,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:34:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,520 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:34:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:34:37,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,619 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:34:37,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:34:37,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:34:37,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:34:37,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:34:37,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:34:41,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:34:41,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:34:41,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:34:41,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 15:34:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793332014] [2022-11-23 15:34:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 15:34:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:34:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 15:34:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:34:41,128 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:41,693 INFO L93 Difference]: Finished difference Result 396 states and 506 transitions. [2022-11-23 15:34:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 15:34:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-11-23 15:34:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:41,696 INFO L225 Difference]: With dead ends: 396 [2022-11-23 15:34:41,696 INFO L226 Difference]: Without dead ends: 299 [2022-11-23 15:34:41,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 458 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 15:34:41,699 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:41,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:34:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-23 15:34:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-23 15:34:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 298 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2022-11-23 15:34:41,716 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 196 [2022-11-23 15:34:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:41,716 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2022-11-23 15:34:41,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:34:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2022-11-23 15:34:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-23 15:34:41,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:41,722 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:41,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:41,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:34:41,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1554822591, now seen corresponding path program 10 times [2022-11-23 15:34:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:34:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420519483] [2022-11-23 15:34:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:34:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:35:10,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:35:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420519483] [2022-11-23 15:35:10,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420519483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:35:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504965820] [2022-11-23 15:35:10,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:35:10,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:35:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:35:10,891 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:35:10,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:35:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:35:12,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 4138 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 15:35:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:35:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:35:12,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:36:00,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504965820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:36:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659042948] [2022-11-23 15:36:00,663 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:36:00,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:36:00,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:36:00,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:36:00,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:36:00,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,820 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-23 15:36:00,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-23 15:36:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:00,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:01,022 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:36:01,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:36:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:01,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 15:36:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:01,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:36:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,287 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 15:36:01,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 500 treesize of output 490 [2022-11-23 15:36:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,782 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:36:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:36:01,814 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:36:01,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:36:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,896 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:36:01,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:36:01,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:36:01,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:01,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:01,993 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:36:01,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,038 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:36:02,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-23 15:36:02,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,076 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:36:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:02,100 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:36:02,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:36:02,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,169 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:36:02,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:36:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,216 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:36:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:02,239 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:36:02,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:36:02,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,327 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:36:02,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:36:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:36:02,383 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:36:02,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:36:02,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:36:03,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11211#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:36:03,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:36:03,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:36:03,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 15:36:03,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89868545] [2022-11-23 15:36:03,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:36:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 15:36:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 15:36:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:36:03,469 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:36:05,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:05,861 INFO L93 Difference]: Finished difference Result 598 states and 809 transitions. [2022-11-23 15:36:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 15:36:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2022-11-23 15:36:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:05,864 INFO L225 Difference]: With dead ends: 598 [2022-11-23 15:36:05,865 INFO L226 Difference]: Without dead ends: 501 [2022-11-23 15:36:05,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 15:36:05,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:05,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:36:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-23 15:36:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-23 15:36:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.012) internal successors, (506), 500 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:36:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 506 transitions. [2022-11-23 15:36:05,894 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 506 transitions. Word has length 297 [2022-11-23 15:36:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:05,895 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 506 transitions. [2022-11-23 15:36:05,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:36:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 506 transitions. [2022-11-23 15:36:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-11-23 15:36:05,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:05,906 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:05,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:36:06,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:36:06,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash -35790047, now seen corresponding path program 11 times [2022-11-23 15:36:06,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:06,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150892385] [2022-11-23 15:36:06,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:06,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:38:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:38:14,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:38:14,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150892385] [2022-11-23 15:38:14,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150892385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:38:14,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366771814] [2022-11-23 15:38:14,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:38:14,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:38:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:38:14,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:38:14,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:44:40,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 15:44:40,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:44:40,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 15:44:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:44:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 22 proven. 253 refuted. 0 times theorem prover too weak. 81740 trivial. 0 not checked. [2022-11-23 15:44:44,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:44:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81762 trivial. 0 not checked. [2022-11-23 15:44:48,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366771814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:44:48,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397397474] [2022-11-23 15:44:48,931 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 15:44:48,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:44:48,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:44:48,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:44:48,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:44:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:48,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:48,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,127 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-23 15:44:49,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-23 15:44:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-23 15:44:49,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 15:44:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:44:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,368 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 15:44:49,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 520 treesize of output 488 [2022-11-23 15:44:49,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,499 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 15:44:49,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 15:44:49,531 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:44:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:44:49,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,596 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:44:49,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:44:49,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,662 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:44:49,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:44:49,688 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:44:49,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:44:49,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,769 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:44:49,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:44:49,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:44:49,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:44:49,859 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:44:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:44:49,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:49,944 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:44:49,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-23 15:44:50,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:50,020 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:44:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:44:50,048 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:44:50,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 15:44:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:50,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:50,217 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:44:50,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-23 15:44:50,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:44:50,307 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:44:50,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:44:50,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:44:52,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16840#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem14#1|) (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem14#1| |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:44:52,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:44:52,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:44:52,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 25] total 452 [2022-11-23 15:44:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874060688] [2022-11-23 15:44:52,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:44:52,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2022-11-23 15:44:52,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:44:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2022-11-23 15:44:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83005, Invalid=125387, Unknown=0, NotChecked=0, Total=208392 [2022-11-23 15:44:52,525 INFO L87 Difference]: Start difference. First operand 501 states and 506 transitions. Second operand has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:44:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:44:56,642 INFO L93 Difference]: Finished difference Result 695 states and 801 transitions. [2022-11-23 15:44:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2022-11-23 15:44:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 499 [2022-11-23 15:44:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:44:56,647 INFO L225 Difference]: With dead ends: 695 [2022-11-23 15:44:56,647 INFO L226 Difference]: Without dead ends: 598 [2022-11-23 15:44:56,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1899 GetRequests, 1444 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21359 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=83005, Invalid=125387, Unknown=0, NotChecked=0, Total=208392 [2022-11-23 15:44:56,657 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:44:56,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:44:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-23 15:44:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-11-23 15:44:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0100502512562815) internal successors, (603), 597 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:44:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 603 transitions. [2022-11-23 15:44:56,685 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 603 transitions. Word has length 499 [2022-11-23 15:44:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:44:56,686 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 603 transitions. [2022-11-23 15:44:56,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 452 states, 452 states have (on average 1.0464601769911503) internal successors, (473), 452 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:44:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 603 transitions. [2022-11-23 15:44:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-11-23 15:44:56,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:44:56,703 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:44:56,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:44:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:44:56,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:44:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:44:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1205473692, now seen corresponding path program 12 times [2022-11-23 15:44:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:44:56,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752591056] [2022-11-23 15:44:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:44:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:44:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:47:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:47:07,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:47:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752591056] [2022-11-23 15:47:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752591056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:47:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251072206] [2022-11-23 15:47:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:47:07,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:47:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:47:07,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:47:07,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a351f602-6f80-43d1-b580-f869e0ec6fbc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:47:09,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:47:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:47:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 8261 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-23 15:47:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:47:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:47:10,582 INFO L328 TraceCheckSpWp]: Computing backward predicates...