./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:11:11,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:11:11,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:11:11,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:11:11,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:11:11,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:11:11,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:11:11,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:11:11,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:11:11,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:11:11,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:11:11,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:11:11,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:11:11,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:11:11,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:11:11,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:11:11,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:11:11,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:11:11,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:11:11,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:11:11,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:11:11,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:11:11,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:11:11,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:11:11,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:11:11,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:11:11,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:11:11,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:11:11,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:11:11,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:11:11,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:11:11,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:11:11,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:11:11,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:11:11,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:11:11,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:11:11,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:11:11,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:11:11,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:11:11,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:11:11,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:11:11,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:11:11,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:11:11,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:11:11,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:11:11,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:11:11,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:11:11,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:11:11,767 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:11:11,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:11:11,767 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:11:11,768 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:11:11,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:11:11,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:11:11,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:11:11,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:11:11,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:11:11,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:11:11,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:11:11,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:11:11,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:11:11,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:11:11,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:11:11,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:11:11,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:11:11,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:11:11,772 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:11:11,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:11:11,774 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_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf [2022-12-14 15:11:11,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:11:11,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:11:11,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:11:11,994 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:11:11,994 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:11:11,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-12-14 15:11:14,582 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:11:14,733 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:11:14,734 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-12-14 15:11:14,738 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/data/74b9dd977/0723efce61704cea8dfd721a9951a924/FLAG649d9e3db [2022-12-14 15:11:15,180 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/data/74b9dd977/0723efce61704cea8dfd721a9951a924 [2022-12-14 15:11:15,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:11:15,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:11:15,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:11:15,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:11:15,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:11:15,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fd8a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15, skipping insertion in model container [2022-12-14 15:11:15,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:11:15,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:11:15,308 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_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-12-14 15:11:15,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:11:15,327 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:11:15,336 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_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] [2022-12-14 15:11:15,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:11:15,354 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:11:15,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15 WrapperNode [2022-12-14 15:11:15,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:11:15,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:11:15,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:11:15,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:11:15,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,379 INFO L138 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-12-14 15:11:15,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:11:15,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:11:15,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:11:15,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:11:15,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,397 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:11:15,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:11:15,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:11:15,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:11:15,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (1/1) ... [2022-12-14 15:11:15,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:11:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:15,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:11:15,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:11:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:11:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:11:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:11:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:11:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:11:15,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:11:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:11:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:11:15,527 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:11:15,528 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:11:15,675 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:11:15,726 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:11:15,727 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 15:11:15,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:11:15 BoogieIcfgContainer [2022-12-14 15:11:15,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:11:15,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:11:15,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:11:15,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:11:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:11:15" (1/3) ... [2022-12-14 15:11:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28edb9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:11:15, skipping insertion in model container [2022-12-14 15:11:15,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:11:15" (2/3) ... [2022-12-14 15:11:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28edb9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:11:15, skipping insertion in model container [2022-12-14 15:11:15,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:11:15" (3/3) ... [2022-12-14 15:11:15,738 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2022-12-14 15:11:15,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:11:15,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:11:15,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:11:15,810 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;@1512caec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:11:15,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:11:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:11:15,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:15,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:15,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1059155307, now seen corresponding path program 1 times [2022-12-14 15:11:15,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:15,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600878116] [2022-12-14 15:11:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:11:16,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:16,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600878116] [2022-12-14 15:11:16,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600878116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:11:16,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:11:16,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:11:16,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110133194] [2022-12-14 15:11:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:11:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:11:16,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:16,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:11:16,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:11:16,137 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:16,193 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-12-14 15:11:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:11:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-12-14 15:11:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:16,201 INFO L225 Difference]: With dead ends: 27 [2022-12-14 15:11:16,201 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 15:11:16,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:11:16,206 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:16,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:11:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 15:11:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 15:11:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-12-14 15:11:16,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 11 [2022-12-14 15:11:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:16,229 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-12-14 15:11:16,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-12-14 15:11:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:11:16,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:16,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:16,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:11:16,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1849771524, now seen corresponding path program 1 times [2022-12-14 15:11:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879801254] [2022-12-14 15:11:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:16,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:11:16,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:16,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879801254] [2022-12-14 15:11:16,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879801254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:16,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680560608] [2022-12-14 15:11:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:16,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:16,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:16,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:11:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:11:16,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:11:16,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:11:16,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680560608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:11:16,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:11:16,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 15:11:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539874517] [2022-12-14 15:11:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:11:16,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:11:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:11:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:11:16,457 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:16,498 INFO L93 Difference]: Finished difference Result 30 states and 48 transitions. [2022-12-14 15:11:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:11:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 15:11:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:16,499 INFO L225 Difference]: With dead ends: 30 [2022-12-14 15:11:16,499 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 15:11:16,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:11:16,501 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:16,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:11:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 15:11:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 15:11:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-12-14 15:11:16,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2022-12-14 15:11:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:16,506 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-12-14 15:11:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-12-14 15:11:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 15:11:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:16,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:16,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:11:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:16,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1022292458, now seen corresponding path program 1 times [2022-12-14 15:11:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125905486] [2022-12-14 15:11:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:11:16,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125905486] [2022-12-14 15:11:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125905486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6095437] [2022-12-14 15:11:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:16,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:16,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:16,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:16,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:11:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:16,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:11:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:11:16,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:11:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6095437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345307560] [2022-12-14 15:11:16,989 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:16,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:16,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:16,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:16,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,444 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:17,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:11:17,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:17,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:11:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:18,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:18,101 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:11:18,102 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 684 treesize of output 674 [2022-12-14 15:11:19,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,309 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:19,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:19,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,381 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:19,381 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 110 treesize of output 115 [2022-12-14 15:11:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,436 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,479 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:19,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:19,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,560 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:19,560 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 100 treesize of output 129 [2022-12-14 15:11:19,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,682 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:19,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:19,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,778 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:19,778 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 100 treesize of output 129 [2022-12-14 15:11:19,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,847 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,869 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:19,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,917 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:19,917 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 110 treesize of output 115 [2022-12-14 15:11:19,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:19,968 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:19,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:19,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,007 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:20,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:20,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,057 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:20,057 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 110 treesize of output 115 [2022-12-14 15:11:20,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:20,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:20,121 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:20,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,188 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:20,189 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 100 treesize of output 129 [2022-12-14 15:11:20,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:20,242 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:20,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:20,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:20,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:20,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:20,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:20,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 15:11:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705813033] [2022-12-14 15:11:20,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:20,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:11:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:11:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:11:20,500 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:20,524 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-12-14 15:11:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:11:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 18 [2022-12-14 15:11:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:20,525 INFO L225 Difference]: With dead ends: 40 [2022-12-14 15:11:20,525 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 15:11:20,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:11:20,526 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:20,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:11:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 15:11:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 15:11:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-12-14 15:11:20,529 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 18 [2022-12-14 15:11:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:20,530 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-12-14 15:11:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-12-14 15:11:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 15:11:20,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:20,531 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:20,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:11:20,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:20,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 103145041, now seen corresponding path program 2 times [2022-12-14 15:11:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:20,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956259975] [2022-12-14 15:11:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:11:20,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956259975] [2022-12-14 15:11:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956259975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850570725] [2022-12-14 15:11:20,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:11:20,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:20,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:20,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:11:20,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:11:20,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:11:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:11:20,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:11:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:11:21,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850570725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:21,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183961467] [2022-12-14 15:11:21,017 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:21,017 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:21,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:21,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:21,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,310 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:21,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:11:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:11:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:21,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:21,735 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:11:21,735 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 704 treesize of output 672 [2022-12-14 15:11:21,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:21,935 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:21,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:21,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:21,969 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:21,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,012 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:22,012 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 110 treesize of output 115 [2022-12-14 15:11:22,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,064 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 [2022-12-14 15:11:22,102 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:22,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:22,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,170 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:22,170 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 100 treesize of output 129 [2022-12-14 15:11:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,215 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,215 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 [2022-12-14 15:11:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,236 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:22,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,271 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:22,271 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 110 treesize of output 115 [2022-12-14 15:11:22,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,307 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,307 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 [2022-12-14 15:11:22,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,324 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:22,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,364 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:22,364 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 110 treesize of output 115 [2022-12-14 15:11:22,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,418 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,455 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:22,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:22,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,526 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:22,527 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 100 treesize of output 129 [2022-12-14 15:11:22,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,593 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,619 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:22,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:22,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,691 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:22,691 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 100 treesize of output 129 [2022-12-14 15:11:22,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:22,778 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:22,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:23,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:23,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:23,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:23,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 15:11:23,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67571221] [2022-12-14 15:11:23,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:11:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:11:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:11:23,081 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:23,141 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2022-12-14 15:11:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:11:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 15:11:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:23,142 INFO L225 Difference]: With dead ends: 56 [2022-12-14 15:11:23,142 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 15:11:23,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:11:23,143 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:23,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:11:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 15:11:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 15:11:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-12-14 15:11:23,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2022-12-14 15:11:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:23,149 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-12-14 15:11:23,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-12-14 15:11:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:11:23,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:23,150 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:23,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:11:23,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:23,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:23,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1888178389, now seen corresponding path program 3 times [2022-12-14 15:11:23,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837262366] [2022-12-14 15:11:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:23,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837262366] [2022-12-14 15:11:23,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837262366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828064249] [2022-12-14 15:11:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:11:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:23,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:23,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:11:23,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:11:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:11:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:11:23,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:23,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:23,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828064249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273041309] [2022-12-14 15:11:23,669 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:23,669 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:23,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:23,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:23,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:23,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,853 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:11:23,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:11:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:24,134 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:24,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:24,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:24,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:11:24,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:24,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:24,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:24,538 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:11:24,539 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 684 treesize of output 674 [2022-12-14 15:11:25,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,317 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:25,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:25,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,343 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:25,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,380 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:25,381 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 110 treesize of output 115 [2022-12-14 15:11:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,437 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,501 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:25,501 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 110 treesize of output 115 [2022-12-14 15:11:25,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,542 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,583 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:25,584 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 15 treesize of output 15 [2022-12-14 15:11:25,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,649 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:25,649 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 100 treesize of output 119 [2022-12-14 15:11:25,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,725 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,748 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,783 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:25,783 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 110 treesize of output 115 [2022-12-14 15:11:25,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,823 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,851 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:25,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:25,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,922 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:25,922 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 100 treesize of output 119 [2022-12-14 15:11:25,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:25,977 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:25,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:26,001 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:26,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:26,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:26,039 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:26,040 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 110 treesize of output 115 [2022-12-14 15:11:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:26,074 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:26,074 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 [2022-12-14 15:11:26,087 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:26,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:26,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:26,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:26,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 15:11:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210341471] [2022-12-14 15:11:26,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:11:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:11:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:11:26,352 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:26,386 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-12-14 15:11:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:11:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 39 [2022-12-14 15:11:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:26,387 INFO L225 Difference]: With dead ends: 82 [2022-12-14 15:11:26,387 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 15:11:26,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:11:26,388 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:26,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:11:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 15:11:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 15:11:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-12-14 15:11:26,391 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2022-12-14 15:11:26,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:26,391 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-12-14 15:11:26,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-12-14 15:11:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:11:26,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:26,392 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:26,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:11:26,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:26,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:26,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:26,594 INFO L85 PathProgramCache]: Analyzing trace with hash -377929589, now seen corresponding path program 4 times [2022-12-14 15:11:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:26,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084565983] [2022-12-14 15:11:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:26,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084565983] [2022-12-14 15:11:26,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084565983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166942938] [2022-12-14 15:11:26,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:11:26,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:26,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:26,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:26,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:11:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:11:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:27,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166942938] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:27,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111840024] [2022-12-14 15:11:27,105 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:27,105 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:27,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:27,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:27,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,373 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:27,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:11:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:11:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:27,687 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:11:27,688 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 684 treesize of output 674 [2022-12-14 15:11:28,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,541 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:28,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:28,564 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:28,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:28,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,639 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:28,640 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 100 treesize of output 119 [2022-12-14 15:11:28,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,699 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:28,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:28,720 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:28,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:28,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,780 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:28,780 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 100 treesize of output 119 [2022-12-14 15:11:28,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,830 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:28,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:28,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,888 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:28,889 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 110 treesize of output 115 [2022-12-14 15:11:28,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:28,935 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 25 treesize of output 25 [2022-12-14 15:11:28,957 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:28,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:28,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:28,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,030 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:29,030 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 100 treesize of output 119 [2022-12-14 15:11:29,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:29,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:29,118 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,169 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:29,169 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 100 treesize of output 119 [2022-12-14 15:11:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,233 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:29,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,253 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,297 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:29,298 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 110 treesize of output 115 [2022-12-14 15:11:29,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:29,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:29,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:29,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:29,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:29,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:29,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:29,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 15:11:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577759422] [2022-12-14 15:11:29,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:29,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:11:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:11:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:11:29,507 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:29,559 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-12-14 15:11:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:11:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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 45 [2022-12-14 15:11:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:29,560 INFO L225 Difference]: With dead ends: 94 [2022-12-14 15:11:29,560 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:11:29,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:11:29,561 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:29,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:11:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:11:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 15:11:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-14 15:11:29,565 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2022-12-14 15:11:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:29,565 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-14 15:11:29,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-14 15:11:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 15:11:29,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:29,566 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:29,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:11:29,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:29,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 171494219, now seen corresponding path program 5 times [2022-12-14 15:11:29,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764539813] [2022-12-14 15:11:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:11:30,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:30,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764539813] [2022-12-14 15:11:30,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764539813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:30,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445667595] [2022-12-14 15:11:30,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:11:30,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:30,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:30,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:30,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:11:30,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:11:30,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:11:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:11:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-12-14 15:11:30,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-12-14 15:11:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445667595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026618172] [2022-12-14 15:11:30,850 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:30,850 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:30,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:30,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:30,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,028 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:11:31,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:11:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,280 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:31,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:11:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:31,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:31,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:31,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:31,580 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:11:31,581 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 684 treesize of output 674 [2022-12-14 15:11:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,376 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:32,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:32,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,433 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:32,433 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 110 treesize of output 115 [2022-12-14 15:11:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,475 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,510 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:32,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,564 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:32,564 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 100 treesize of output 129 [2022-12-14 15:11:32,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,662 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:32,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:32,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,722 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:32,722 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 100 treesize of output 119 [2022-12-14 15:11:32,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,788 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,811 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,846 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:32,847 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 110 treesize of output 115 [2022-12-14 15:11:32,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,901 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:32,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:32,943 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:32,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:32,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:33,014 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:33,014 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 100 treesize of output 119 [2022-12-14 15:11:33,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:33,068 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:33,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:33,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:33,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:33,149 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:33,149 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 100 treesize of output 129 [2022-12-14 15:11:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:33,225 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:33,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:33,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:33,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:33,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:33,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:33,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 15:11:33,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487831687] [2022-12-14 15:11:33,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:33,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:11:33,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:11:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:11:33,532 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:33,682 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2022-12-14 15:11:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 15:11:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 57 [2022-12-14 15:11:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:33,684 INFO L225 Difference]: With dead ends: 131 [2022-12-14 15:11:33,684 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 15:11:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:11:33,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:33,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:11:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 15:11:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-14 15:11:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:33,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-12-14 15:11:33,692 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 57 [2022-12-14 15:11:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:33,692 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-12-14 15:11:33,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-12-14 15:11:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:11:33,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:33,693 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:33,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:11:33,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:33,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1872030492, now seen corresponding path program 6 times [2022-12-14 15:11:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328239334] [2022-12-14 15:11:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:34,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328239334] [2022-12-14 15:11:34,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328239334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501250449] [2022-12-14 15:11:34,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:11:34,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:34,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:34,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:11:34,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:11:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:11:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:11:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:34,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:35,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501250449] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:35,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337183362] [2022-12-14 15:11:35,307 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:35,307 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:35,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:35,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:35,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,474 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:11:35,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:11:35,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,749 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:35,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:35,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 15:11:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,048 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 15:11:36,048 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 704 treesize of output 672 [2022-12-14 15:11:36,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,202 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:36,232 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:36,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,282 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:36,283 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 100 treesize of output 119 [2022-12-14 15:11:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,332 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,350 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:36,350 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 15 treesize of output 15 [2022-12-14 15:11:36,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,395 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:36,395 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 100 treesize of output 119 [2022-12-14 15:11:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,463 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,498 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:36,499 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 110 treesize of output 115 [2022-12-14 15:11:36,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,529 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,546 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:36,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,608 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:11:36,608 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 100 treesize of output 129 [2022-12-14 15:11:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,682 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,699 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:36,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:36,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,743 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:36,743 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 100 treesize of output 119 [2022-12-14 15:11:36,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,784 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,801 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,830 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:36,830 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 110 treesize of output 115 [2022-12-14 15:11:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:36,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:36,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:36,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:37,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3249#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:37,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:37,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:37,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 15:11:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161726589] [2022-12-14 15:11:37,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:11:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:11:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:11:37,161 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:37,247 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-12-14 15:11:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 15:11:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 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 94 [2022-12-14 15:11:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:37,247 INFO L225 Difference]: With dead ends: 192 [2022-12-14 15:11:37,248 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 15:11:37,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:11:37,249 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:37,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:11:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 15:11:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-12-14 15:11:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2022-12-14 15:11:37,254 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 94 [2022-12-14 15:11:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:37,255 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2022-12-14 15:11:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2022-12-14 15:11:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 15:11:37,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:37,256 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:37,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 15:11:37,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:37,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1124583125, now seen corresponding path program 7 times [2022-12-14 15:11:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:37,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763701647] [2022-12-14 15:11:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:39,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763701647] [2022-12-14 15:11:39,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763701647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120159117] [2022-12-14 15:11:39,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:11:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:39,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:39,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:11:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:11:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:11:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:39,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:11:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:41,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120159117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:11:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461948861] [2022-12-14 15:11:41,348 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:11:41,348 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:11:41,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:11:41,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:11:41,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:11:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,524 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:11:41,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:11:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,769 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:11:41,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:11:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:41,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:11:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,085 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:11:42,085 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 684 treesize of output 674 [2022-12-14 15:11:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,855 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:11:42,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:11:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,877 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:42,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:42,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,907 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:42,907 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 110 treesize of output 115 [2022-12-14 15:11:42,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:42,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:42,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:42,976 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:42,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,027 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:43,028 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 100 treesize of output 119 [2022-12-14 15:11:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,072 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:43,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,142 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:43,143 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 100 treesize of output 119 [2022-12-14 15:11:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,202 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,220 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:11:43,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:11:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,273 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:11:43,274 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 100 treesize of output 119 [2022-12-14 15:11:43,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,344 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,363 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:43,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,398 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:43,398 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 110 treesize of output 115 [2022-12-14 15:11:43,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,432 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,452 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:11:43,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,485 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:11:43,485 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 110 treesize of output 115 [2022-12-14 15:11:43,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:11:43,516 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:11:43,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:11:43,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:11:43,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4675#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:11:43,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:11:43,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:11:43,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 15:11:43,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288401203] [2022-12-14 15:11:43,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:11:43,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 15:11:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:11:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 15:11:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:11:43,893 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:11:44,020 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2022-12-14 15:11:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 15:11:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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 119 [2022-12-14 15:11:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:11:44,021 INFO L225 Difference]: With dead ends: 242 [2022-12-14 15:11:44,021 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 15:11:44,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:11:44,024 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:11:44,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:11:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 15:11:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-12-14 15:11:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 178 transitions. [2022-12-14 15:11:44,031 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 178 transitions. Word has length 119 [2022-12-14 15:11:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:11:44,031 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 178 transitions. [2022-12-14 15:11:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:11:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 178 transitions. [2022-12-14 15:11:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:11:44,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:11:44,033 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:11:44,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:11:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 15:11:44,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:11:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:11:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -955054261, now seen corresponding path program 8 times [2022-12-14 15:11:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:11:44,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757947621] [2022-12-14 15:11:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:11:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:11:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:11:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:11:49,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:11:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757947621] [2022-12-14 15:11:49,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757947621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:11:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132413597] [2022-12-14 15:11:49,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:11:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:11:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:11:49,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:11:49,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:12:00,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:12:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:12:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:12:00,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:12:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 98 proven. 55 refuted. 0 times theorem prover too weak. 5028 trivial. 0 not checked. [2022-12-14 15:12:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:12:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 5099 trivial. 0 not checked. [2022-12-14 15:12:00,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132413597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:12:00,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445532761] [2022-12-14 15:12:00,883 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:12:00,883 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:12:00,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:12:00,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:12:00,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:12:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,139 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:12:01,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:12:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:12:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:12:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:01,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:01,454 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:12:01,454 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 684 treesize of output 674 [2022-12-14 15:12:02,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,207 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:12:02,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:12:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,234 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,272 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:02,272 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 110 treesize of output 115 [2022-12-14 15:12:02,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,368 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,406 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:02,406 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 110 treesize of output 115 [2022-12-14 15:12:02,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,486 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:02,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,524 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:02,524 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 110 treesize of output 115 [2022-12-14 15:12:02,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,559 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,618 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:02,619 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 110 treesize of output 115 [2022-12-14 15:12:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,667 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,697 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:12:02,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:12:02,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,758 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:12:02,758 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 100 treesize of output 129 [2022-12-14 15:12:02,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,815 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:02,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,870 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:02,870 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 110 treesize of output 115 [2022-12-14 15:12:02,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:02,906 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:02,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:02,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:12:03,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6626#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:12:03,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:12:03,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:12:03,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 14, 15] total 126 [2022-12-14 15:12:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884905491] [2022-12-14 15:12:03,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:12:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-12-14 15:12:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:12:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-12-14 15:12:03,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5497, Invalid=11533, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 15:12:03,603 INFO L87 Difference]: Start difference. First operand 171 states and 178 transitions. Second operand has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:12:04,750 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2022-12-14 15:12:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-12-14 15:12:04,751 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 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 169 [2022-12-14 15:12:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:12:04,753 INFO L225 Difference]: With dead ends: 315 [2022-12-14 15:12:04,753 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 15:12:04,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6113, Invalid=17449, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 15:12:04,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:12:04,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 36 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:12:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 15:12:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-12-14 15:12:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0329218106995885) internal successors, (251), 243 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2022-12-14 15:12:04,769 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 169 [2022-12-14 15:12:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:12:04,769 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2022-12-14 15:12:04,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2022-12-14 15:12:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 15:12:04,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:12:04,771 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:12:04,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:12:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:04,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:12:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:12:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -314083420, now seen corresponding path program 9 times [2022-12-14 15:12:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:12:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767832979] [2022-12-14 15:12:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:04,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:12:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:12:10,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:12:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767832979] [2022-12-14 15:12:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767832979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:12:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017633357] [2022-12-14 15:12:10,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:12:10,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:10,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:10,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:12:10,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:12:11,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:12:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:12:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 15:12:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:12:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:12:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:12:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:12:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017633357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:12:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79387315] [2022-12-14 15:12:19,267 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:12:19,267 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:12:19,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:12:19,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:12:19,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:12:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,425 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:12:19,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:12:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,651 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:12:19,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:12:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:12:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:19,964 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:12:19,964 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 684 treesize of output 674 [2022-12-14 15:12:20,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,735 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:12:20,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:12:20,761 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:12:20,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:12:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,835 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:12:20,836 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 100 treesize of output 119 [2022-12-14 15:12:20,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:20,904 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 [2022-12-14 15:12:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,924 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:20,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:20,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:20,959 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:20,959 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 110 treesize of output 115 [2022-12-14 15:12:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,007 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,036 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:21,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,066 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:21,066 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 110 treesize of output 115 [2022-12-14 15:12:21,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,110 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:21,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,144 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:21,145 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 110 treesize of output 115 [2022-12-14 15:12:21,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,184 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,184 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 [2022-12-14 15:12:21,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,217 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,217 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 25 treesize of output 25 [2022-12-14 15:12:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:12:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,250 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:12:21,250 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 110 treesize of output 115 [2022-12-14 15:12:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,282 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,302 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:12:21,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:12:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,357 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:12:21,357 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 100 treesize of output 129 [2022-12-14 15:12:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:12:21,422 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:12:21,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:12:21,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:12:25,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9430#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:12:25,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:12:25,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:12:25,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 15:12:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086020340] [2022-12-14 15:12:25,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:12:25,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 15:12:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:12:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 15:12:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:12:25,543 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:12:25,886 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2022-12-14 15:12:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 15:12:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 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 242 [2022-12-14 15:12:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:12:25,888 INFO L225 Difference]: With dead ends: 488 [2022-12-14 15:12:25,888 INFO L226 Difference]: Without dead ends: 345 [2022-12-14 15:12:25,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 573 SyntacticMatches, 46 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15696 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:12:25,890 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:12:25,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:12:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-12-14 15:12:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-12-14 15:12:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2022-12-14 15:12:25,901 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 242 [2022-12-14 15:12:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:12:25,901 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2022-12-14 15:12:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:12:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2022-12-14 15:12:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-12-14 15:12:25,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:12:25,904 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:12:25,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:12:26,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:26,106 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:12:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:12:26,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1965399765, now seen corresponding path program 10 times [2022-12-14 15:12:26,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:12:26,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598451008] [2022-12-14 15:12:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:12:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:12:48,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:12:48,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598451008] [2022-12-14 15:12:48,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598451008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:12:48,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113051650] [2022-12-14 15:12:48,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:12:48,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:12:48,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:48,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:12:48,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:12:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:12:49,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 4494 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 15:12:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:12:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:12:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:13:18,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113051650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829025399] [2022-12-14 15:13:18,497 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:13:18,497 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:18,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:18,498 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:18,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,709 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:13:18,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:13:18,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:18,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:19,032 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:13:19,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:13:19,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:19,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 15:13:19,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:19,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:19,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:19,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:19,348 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 15:13:19,348 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 684 treesize of output 674 [2022-12-14 15:13:20,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,121 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 15:13:20,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 15:13:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:20,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,187 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:20,187 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 110 treesize of output 115 [2022-12-14 15:13:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,276 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,313 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:20,313 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 110 treesize of output 115 [2022-12-14 15:13:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,381 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,417 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,455 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:20,456 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 110 treesize of output 115 [2022-12-14 15:13:20,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,511 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:13:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,548 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:13:20,549 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 110 treesize of output 115 [2022-12-14 15:13:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,599 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,644 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:20,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,713 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:20,714 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 100 treesize of output 119 [2022-12-14 15:13:20,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,756 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,756 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 [2022-12-14 15:13:20,778 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:13:20,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:13:20,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,845 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:13:20,845 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 100 treesize of output 119 [2022-12-14 15:13:20,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:13:20,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:13:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:13:20,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:21,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13544#(and (<= 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) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem18#1|) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem18#1| |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem17#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)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:13:21,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:13:21,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 15:13:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430187530] [2022-12-14 15:13:21,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:13:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 15:13:21,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 15:13:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:13:22,018 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:24,243 INFO L93 Difference]: Finished difference Result 690 states and 905 transitions. [2022-12-14 15:13:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 15:13:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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 343 [2022-12-14 15:13:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:24,245 INFO L225 Difference]: With dead ends: 690 [2022-12-14 15:13:24,245 INFO L226 Difference]: Without dead ends: 547 [2022-12-14 15:13:24,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:13:24,251 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:24,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:13:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-12-14 15:13:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-12-14 15:13:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0146520146520146) internal successors, (554), 546 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 554 transitions. [2022-12-14 15:13:24,267 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 554 transitions. Word has length 343 [2022-12-14 15:13:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:24,267 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 554 transitions. [2022-12-14 15:13:24,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:13:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 554 transitions. [2022-12-14 15:13:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-12-14 15:13:24,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:24,274 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:13:24,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:13:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:13:24,476 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1619209419, now seen corresponding path program 11 times [2022-12-14 15:13:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308715759] [2022-12-14 15:13:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:24,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:14:53,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308715759] [2022-12-14 15:14:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308715759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671330828] [2022-12-14 15:14:53,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:14:53,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:53,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:53,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:53,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff39e3c6-0df1-4bd1-b0da-a06dfbb05681/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process