./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/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_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/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_12645f43-a545-4336-b56c-d24c9a6833d7/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 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 --- 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 09:05:02,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:05:02,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:05:03,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:05:03,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:05:03,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:05:03,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:05:03,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:05:03,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:05:03,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:05:03,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:05:03,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:05:03,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:05:03,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:05:03,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:05:03,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:05:03,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:05:03,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:05:03,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:05:03,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:05:03,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:05:03,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:05:03,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:05:03,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:05:03,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:05:03,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:05:03,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:05:03,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:05:03,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:05:03,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:05:03,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:05:03,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:05:03,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:05:03,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:05:03,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:05:03,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:05:03,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:05:03,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:05:03,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:05:03,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:05:03,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:05:03,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:05:03,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:05:03,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:05:03,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:05:03,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:05:03,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:05:03,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:05:03,049 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:05:03,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:05:03,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:05:03,050 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:05:03,054 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:05:03,054 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:05:03,055 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:05:03,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:05:03,055 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:05:03,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:05:03,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:05:03,056 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:05:03,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:05:03,056 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:05:03,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:05:03,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:05:03,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:05:03,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:05:03,058 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:05:03,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:05:03,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:05:03,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:05:03,059 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_12645f43-a545-4336-b56c-d24c9a6833d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 [2022-12-14 09:05:03,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:05:03,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:05:03,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:05:03,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:05:03,243 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:05:03,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/sina4.c [2022-12-14 09:05:05,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:05:05,867 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:05:05,867 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/sv-benchmarks/c/array-fpi/sina4.c [2022-12-14 09:05:05,871 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/data/c745d4f28/515e30e928bd489ab3b53411b62231c0/FLAG4b816dc92 [2022-12-14 09:05:06,300 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/data/c745d4f28/515e30e928bd489ab3b53411b62231c0 [2022-12-14 09:05:06,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:05:06,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:05:06,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:05:06,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:05:06,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:05:06,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417387e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06, skipping insertion in model container [2022-12-14 09:05:06,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:05:06,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:05:06,424 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_12645f43-a545-4336-b56c-d24c9a6833d7/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-12-14 09:05:06,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:05:06,444 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:05:06,453 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_12645f43-a545-4336-b56c-d24c9a6833d7/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-12-14 09:05:06,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:05:06,468 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:05:06,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06 WrapperNode [2022-12-14 09:05:06,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:05:06,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:05:06,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:05:06,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:05:06,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,492 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 106 [2022-12-14 09:05:06,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:05:06,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:05:06,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:05:06,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:05:06,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,508 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:05:06,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:05:06,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:05:06,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:05:06,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (1/1) ... [2022-12-14 09:05:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:05:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:06,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:05:06,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:05:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:05:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:05:06,621 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:05:06,622 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:05:06,735 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:05:06,770 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:05:06,770 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 09:05:06,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:05:06 BoogieIcfgContainer [2022-12-14 09:05:06,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:05:06,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:05:06,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:05:06,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:05:06,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:05:06" (1/3) ... [2022-12-14 09:05:06,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1300997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:05:06, skipping insertion in model container [2022-12-14 09:05:06,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:05:06" (2/3) ... [2022-12-14 09:05:06,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1300997f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:05:06, skipping insertion in model container [2022-12-14 09:05:06,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:05:06" (3/3) ... [2022-12-14 09:05:06,778 INFO L112 eAbstractionObserver]: Analyzing ICFG sina4.c [2022-12-14 09:05:06,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:05:06,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:05:06,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:05:06,831 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;@62733bf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:05:06,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:05:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:05:06,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:06,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:06,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash -155408202, now seen corresponding path program 1 times [2022-12-14 09:05:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541949202] [2022-12-14 09:05:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:06,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:07,075 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 09:05:07,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:07,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541949202] [2022-12-14 09:05:07,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541949202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:07,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:07,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:05:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780385713] [2022-12-14 09:05:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:07,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:05:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:05:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:05:07,108 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:07,156 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-12-14 09:05:07,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:07,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:05:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:07,163 INFO L225 Difference]: With dead ends: 24 [2022-12-14 09:05:07,164 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 09:05:07,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 09:05:07,168 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:07,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:05:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 09:05:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 09:05:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-12-14 09:05:07,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-12-14 09:05:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:07,193 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-12-14 09:05:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-12-14 09:05:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:05:07,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:07,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:07,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:05:07,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1655315069, now seen corresponding path program 1 times [2022-12-14 09:05:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:07,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884280081] [2022-12-14 09:05:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:07,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:07,281 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 09:05:07,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884280081] [2022-12-14 09:05:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884280081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:07,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:07,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:05:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955166158] [2022-12-14 09:05:07,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:07,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:05:07,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:05:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:05:07,285 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:07,318 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-12-14 09:05:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:05:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:05:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:07,319 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:05:07,320 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 09:05:07,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:05:07,322 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:07,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 6 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:05:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 09:05:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-12-14 09:05:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-12-14 09:05:07,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-12-14 09:05:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:07,327 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-12-14 09:05:07,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-12-14 09:05:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:05:07,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:07,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:05:07,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash -165518152, now seen corresponding path program 1 times [2022-12-14 09:05:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340872569] [2022-12-14 09:05:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:08,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340872569] [2022-12-14 09:05:08,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340872569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:08,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329892403] [2022-12-14 09:05:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:08,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:08,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:05:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:08,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 09:05:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:08,293 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:05:08,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 09:05:08,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 09:05:08,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 09:05:08,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 09:05:08,636 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-12-14 09:05:08,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-12-14 09:05:08,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:05:08,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 72 [2022-12-14 09:05:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:08,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:10,936 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ c_~N~0 2))) is different from false [2022-12-14 09:05:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-14 09:05:11,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329892403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330019832] [2022-12-14 09:05:11,176 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:11,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:11,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:11,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:11,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:11,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,324 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 09:05:11,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 09:05:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,364 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:05:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 09:05:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,509 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:11,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:11,749 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:11,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:11,856 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:11,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:11,914 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 09:05:11,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 09:05:11,970 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:11,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:11,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:12,007 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:12,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 09:05:12,066 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:12,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:12,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:12,117 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:12,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:12,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:12,156 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:12,169 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:12,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:12,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:12,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:12,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-12-14 09:05:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725476959] [2022-12-14 09:05:12,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 09:05:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 09:05:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=881, Unknown=1, NotChecked=60, Total=1056 [2022-12-14 09:05:12,510 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 09:05:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:12,954 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-12-14 09:05:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:05:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 13 [2022-12-14 09:05:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:12,955 INFO L225 Difference]: With dead ends: 35 [2022-12-14 09:05:12,955 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 09:05:12,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=171, Invalid=1314, Unknown=1, NotChecked=74, Total=1560 [2022-12-14 09:05:12,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:12,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 56 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 248 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-12-14 09:05:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 09:05:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-12-14 09:05:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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 09:05:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-12-14 09:05:12,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2022-12-14 09:05:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:12,965 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-12-14 09:05:12,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 09:05:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 09:05:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:05:12,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:12,966 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:05:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:13,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1745611751, now seen corresponding path program 2 times [2022-12-14 09:05:13,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:13,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720882506] [2022-12-14 09:05:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:13,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720882506] [2022-12-14 09:05:13,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720882506] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:13,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120456470] [2022-12-14 09:05:13,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:05:13,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:13,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:13,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:05:13,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:05:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:05:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:13,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:13,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120456470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198826598] [2022-12-14 09:05:13,373 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:13,373 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:13,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:13,374 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:13,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,495 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:13,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 09:05:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 09:05:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:13,818 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:13,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:13,909 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:13,966 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:13,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:14,023 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:14,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:14,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:14,071 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:14,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:14,116 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:14,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:14,137 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:05:14,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:05:14,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:14,169 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:14,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:14,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:14,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:14,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:14,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:14,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-12-14 09:05:14,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691668501] [2022-12-14 09:05:14,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:05:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:14,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:05:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:05:14,492 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:05:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:14,562 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-12-14 09:05:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:05:14,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) Word has length 14 [2022-12-14 09:05:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:14,562 INFO L225 Difference]: With dead ends: 62 [2022-12-14 09:05:14,563 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 09:05:14,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:05:14,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:14,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 09:05:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-12-14 09:05:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-12-14 09:05:14,567 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2022-12-14 09:05:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:14,567 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-12-14 09:05:14,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 09:05:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-12-14 09:05:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:05:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:14,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:14,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:05:14,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:14,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -421291265, now seen corresponding path program 3 times [2022-12-14 09:05:14,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920875941] [2022-12-14 09:05:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:14,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:14,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920875941] [2022-12-14 09:05:14,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920875941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:14,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262941440] [2022-12-14 09:05:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:05:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:14,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:14,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:05:14,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:05:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:05:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:14,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:05:14,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262941440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553212140] [2022-12-14 09:05:14,950 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:14,950 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:14,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:14,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:14,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,046 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:15,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:15,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 09:05:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 09:05:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:15,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:15,285 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:15,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:15,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:15,426 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 09:05:15,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 09:05:15,473 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:15,505 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:15,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:15,548 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:15,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:15,588 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:15,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:15,620 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:15,620 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 27 treesize of output 31 [2022-12-14 09:05:15,633 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:15,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '687#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:15,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:15,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:15,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 09:05:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765665741] [2022-12-14 09:05:15,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:15,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:05:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:05:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:05:15,878 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 09:05:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:15,979 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-12-14 09:05:15,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:05:15,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) Word has length 14 [2022-12-14 09:05:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:15,980 INFO L225 Difference]: With dead ends: 37 [2022-12-14 09:05:15,980 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 09:05:15,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:05:15,981 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:15,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 09:05:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-12-14 09:05:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 09:05:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-14 09:05:15,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-12-14 09:05:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:15,985 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-14 09:05:15,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 09:05:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-14 09:05:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:05:15,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:15,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:15,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:05:16,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:16,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1101372854, now seen corresponding path program 4 times [2022-12-14 09:05:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150288094] [2022-12-14 09:05:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:16,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:17,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:17,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150288094] [2022-12-14 09:05:17,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150288094] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:17,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637953989] [2022-12-14 09:05:17,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:05:17,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:17,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:17,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:17,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:05:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 09:05:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:17,236 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:05:17,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 09:05:17,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 09:05:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 09:05:17,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,394 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 0 case distinctions, treesize of input 48 treesize of output 38 [2022-12-14 09:05:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:17,450 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-12-14 09:05:17,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,551 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 0 case distinctions, treesize of input 59 treesize of output 40 [2022-12-14 09:05:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:17,608 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 0 case distinctions, treesize of input 40 treesize of output 36 [2022-12-14 09:05:17,727 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-12-14 09:05:17,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:05:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:17,873 INFO L321 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2022-12-14 09:05:17,873 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 4 case distinctions, treesize of input 49 treesize of output 62 [2022-12-14 09:05:18,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:05:18,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 70 [2022-12-14 09:05:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:20,161 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_231 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (or (= (select (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_155|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_231) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ c_~N~0 2)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_155|)))) is different from false [2022-12-14 09:05:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 09:05:20,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637953989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:20,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623635532] [2022-12-14 09:05:20,986 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:20,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:20,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:20,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:20,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,110 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 09:05:21,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 09:05:21,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,147 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:05:21,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 09:05:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,297 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:21,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:21,497 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:21,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:21,571 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:21,612 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:21,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:21,665 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:21,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:21,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:21,722 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:21,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:21,765 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:21,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:21,788 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:05:21,788 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 17 treesize of output 21 [2022-12-14 09:05:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:21,816 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:21,816 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 27 treesize of output 31 [2022-12-14 09:05:21,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:22,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:22,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:22,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-12-14 09:05:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724892874] [2022-12-14 09:05:22,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:22,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 09:05:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 09:05:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1894, Unknown=1, NotChecked=88, Total=2162 [2022-12-14 09:05:22,339 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 09:05:30,111 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 62 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:33,422 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2022-12-14 09:05:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 09:05:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 09:05:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:33,423 INFO L225 Difference]: With dead ends: 68 [2022-12-14 09:05:33,423 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 09:05:33,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=473, Invalid=4642, Unknown=1, NotChecked=140, Total=5256 [2022-12-14 09:05:33,425 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 79 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:33,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 199 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 691 Invalid, 0 Unknown, 52 Unchecked, 1.2s Time] [2022-12-14 09:05:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 09:05:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2022-12-14 09:05:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 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 09:05:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-12-14 09:05:33,440 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 17 [2022-12-14 09:05:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:33,441 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-12-14 09:05:33,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 09:05:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-12-14 09:05:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:05:33,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:33,441 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:33,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 09:05:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:05:33,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:33,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash 314642723, now seen corresponding path program 5 times [2022-12-14 09:05:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131675784] [2022-12-14 09:05:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:33,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131675784] [2022-12-14 09:05:33,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131675784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393228732] [2022-12-14 09:05:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:05:33,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:33,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:33,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:33,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:05:33,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:05:33,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:33,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:05:33,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:33,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:33,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393228732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012775126] [2022-12-14 09:05:33,928 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:33,928 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:33,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:33,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:33,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:33,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,065 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 09:05:34,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 09:05:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,172 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:34,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 09:05:34,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:34,367 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:34,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:34,443 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:34,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:34,487 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 09:05:34,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 09:05:34,536 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:34,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:34,565 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:34,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:34,612 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:34,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:34,652 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:34,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:34,683 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:34,683 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 27 treesize of output 31 [2022-12-14 09:05:34,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:34,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1274#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:34,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:34,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:34,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-14 09:05:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13402546] [2022-12-14 09:05:34,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:05:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:05:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:05:34,983 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:35,102 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-12-14 09:05:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:05:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:05:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:35,103 INFO L225 Difference]: With dead ends: 89 [2022-12-14 09:05:35,103 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 09:05:35,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:05:35,104 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:35,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 30 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 09:05:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-12-14 09:05:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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 09:05:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-12-14 09:05:35,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-12-14 09:05:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:35,116 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-12-14 09:05:35,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-12-14 09:05:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:05:35,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:35,117 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:35,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:05:35,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:05:35,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash -423339907, now seen corresponding path program 6 times [2022-12-14 09:05:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:35,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008891092] [2022-12-14 09:05:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:35,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:35,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008891092] [2022-12-14 09:05:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008891092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843283692] [2022-12-14 09:05:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:05:35,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:35,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:35,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:05:35,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:05:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:05:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843283692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748489066] [2022-12-14 09:05:35,533 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:05:35,533 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:35,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:35,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:35,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,567 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:05:35,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 09:05:35,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,692 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 09:05:35,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 09:05:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,832 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:35,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 09:05:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:35,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:35,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,006 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 09:05:36,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 09:05:36,155 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,197 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:36,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:36,245 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:36,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:36,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,287 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:36,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:05:36,330 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:36,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:36,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,353 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:36,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,382 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:36,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:36,405 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:36,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:36,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:36,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1625#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:36,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:36,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:36,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-14 09:05:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366662273] [2022-12-14 09:05:36,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:05:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:05:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:05:36,642 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:36,781 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-12-14 09:05:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:05:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:05:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:36,782 INFO L225 Difference]: With dead ends: 67 [2022-12-14 09:05:36,782 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 09:05:36,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:05:36,783 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:36,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 47 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 09:05:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-12-14 09:05:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-12-14 09:05:36,793 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-12-14 09:05:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-12-14 09:05:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-12-14 09:05:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:05:36,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:36,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:36,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:05:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 09:05:36,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1748691183, now seen corresponding path program 1 times [2022-12-14 09:05:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497150341] [2022-12-14 09:05:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:38,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:38,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497150341] [2022-12-14 09:05:38,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497150341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:38,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327314872] [2022-12-14 09:05:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:38,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:38,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:05:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 09:05:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:38,376 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:05:38,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-12-14 09:05:38,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:05:38,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 09:05:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 09:05:38,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-12-14 09:05:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-12-14 09:05:38,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2022-12-14 09:05:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-12-14 09:05:38,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:38,934 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-12-14 09:05:38,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2022-12-14 09:05:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:39,004 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-12-14 09:05:39,004 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 4 case distinctions, treesize of input 41 treesize of output 42 [2022-12-14 09:05:39,241 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-12-14 09:05:39,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 39 [2022-12-14 09:05:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:39,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:41,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327314872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:41,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960966804] [2022-12-14 09:05:41,390 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 09:05:41,390 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:05:41,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:05:41,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:05:41,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:05:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,512 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-12-14 09:05:41,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-12-14 09:05:41,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,541 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:05:41,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 09:05:41,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,655 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:05:41,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:05:41,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:05:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:41,840 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:05:41,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:05:41,924 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:05:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:41,967 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 09:05:41,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 09:05:42,006 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:05:42,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:05:42,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:42,030 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:05:42,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 09:05:42,065 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:05:42,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:05:42,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:42,097 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:42,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:05:42,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:42,119 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:05:42,119 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 27 treesize of output 31 [2022-12-14 09:05:42,192 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:42,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1973#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:42,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:42,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-12-14 09:05:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971044970] [2022-12-14 09:05:42,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 09:05:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 09:05:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 09:05:42,911 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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 09:05:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:56,331 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 09:05:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:05:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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 20 [2022-12-14 09:05:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:56,332 INFO L225 Difference]: With dead ends: 40 [2022-12-14 09:05:56,332 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 09:05:56,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=322, Invalid=3218, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 09:05:56,333 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:56,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 09:05:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 09:05:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-14 09:05:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 09:05:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 09:05:56,339 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2022-12-14 09:05:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:56,339 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 09:05:56,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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 09:05:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 09:05:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:05:56,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:56,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:56,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:05:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:56,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:05:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1643001400, now seen corresponding path program 7 times [2022-12-14 09:05:56,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:56,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987169522] [2022-12-14 09:05:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:56,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:57,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:57,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987169522] [2022-12-14 09:05:57,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987169522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:57,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459177056] [2022-12-14 09:05:57,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:05:57,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:57,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:57,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:57,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:05:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 09:05:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:57,763 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:05:57,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 09:05:57,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 09:05:57,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 09:05:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 09:05:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-12-14 09:05:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 09:05:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:57,987 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 0 case distinctions, treesize of input 68 treesize of output 49 [2022-12-14 09:05:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2022-12-14 09:05:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:05:58,163 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 0 case distinctions, treesize of input 81 treesize of output 60 [2022-12-14 09:05:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,239 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 0 case distinctions, treesize of input 43 treesize of output 35 [2022-12-14 09:05:58,375 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-12-14 09:05:58,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-12-14 09:05:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,506 INFO L321 Elim1Store]: treesize reduction 55, result has 27.6 percent of original size [2022-12-14 09:05:58,507 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 4 case distinctions, treesize of input 44 treesize of output 63 [2022-12-14 09:05:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,595 INFO L321 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2022-12-14 09:05:58,595 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 4 case distinctions, treesize of input 41 treesize of output 56 [2022-12-14 09:05:58,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:05:58,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 68 [2022-12-14 09:05:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:58,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:06:23,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459177056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:23,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250896658] [2022-12-14 09:06:23,568 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:06:23,568 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:06:23,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:06:23,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:06:23,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:06:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,594 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:06:23,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-12-14 09:06:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,683 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:06:23,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:06:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 09:06:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-12-14 09:06:23,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:23,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:23,880 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 09:06:23,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-12-14 09:06:23,950 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:06:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:23,990 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:06:23,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:06:24,039 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:06:24,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:06:24,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:24,077 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:06:24,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 09:06:24,119 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:06:24,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:06:24,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:24,141 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:06:24,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:06:24,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:24,165 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:06:24,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:06:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:24,193 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:06:24,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:06:24,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:06:24,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2274#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:06:24,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:06:24,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2022-12-14 09:06:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927944493] [2022-12-14 09:06:24,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:24,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:06:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:06:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2739, Unknown=8, NotChecked=0, Total=2970 [2022-12-14 09:06:24,734 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:29,687 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2022-12-14 09:06:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 09:06:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:06:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:29,689 INFO L225 Difference]: With dead ends: 95 [2022-12-14 09:06:29,689 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 09:06:29,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=626, Invalid=6676, Unknown=8, NotChecked=0, Total=7310 [2022-12-14 09:06:29,690 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:29,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 227 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 09:06:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 09:06:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 42. [2022-12-14 09:06:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-12-14 09:06:29,708 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 21 [2022-12-14 09:06:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:29,708 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-12-14 09:06:29,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-12-14 09:06:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:06:29,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:29,709 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:29,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:06:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:06:29,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:06:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1877723777, now seen corresponding path program 8 times [2022-12-14 09:06:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:29,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349121480] [2022-12-14 09:06:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:06:30,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349121480] [2022-12-14 09:06:30,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349121480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064796342] [2022-12-14 09:06:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:06:30,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:30,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:30,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:06:30,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:06:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:06:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:06:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:06:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:06:30,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064796342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327561391] [2022-12-14 09:06:30,231 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:06:30,231 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:06:30,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:06:30,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:06:30,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:06:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,345 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-12-14 09:06:30,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-12-14 09:06:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-12-14 09:06:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-12-14 09:06:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-12-14 09:06:30,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:30,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:30,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:30,558 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 09:06:30,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-12-14 09:06:30,657 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:06:30,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:30,700 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:06:30,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:06:30,748 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 09:06:30,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 09:06:30,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:30,800 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 09:06:30,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 09:06:30,848 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 09:06:30,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 09:06:30,868 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:06:30,869 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 17 treesize of output 21 [2022-12-14 09:06:30,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:30,899 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 09:06:30,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 09:06:30,928 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:06:31,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2713#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 09:06:31,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:06:31,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:31,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-14 09:06:31,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694212573] [2022-12-14 09:06:31,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:31,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 09:06:31,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 09:06:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:06:31,238 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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 09:06:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:31,447 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2022-12-14 09:06:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:06:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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 22 [2022-12-14 09:06:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:31,448 INFO L225 Difference]: With dead ends: 99 [2022-12-14 09:06:31,448 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 09:06:31,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-12-14 09:06:31,449 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:31,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 128 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 09:06:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-12-14 09:06:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 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 09:06:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-12-14 09:06:31,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 22 [2022-12-14 09:06:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:31,466 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-12-14 09:06:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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 09:06:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-12-14 09:06:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:06:31,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:31,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:31,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 09:06:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:31,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:06:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1212573997, now seen corresponding path program 2 times [2022-12-14 09:06:31,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:31,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88441964] [2022-12-14 09:06:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:31,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:06:33,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88441964] [2022-12-14 09:06:33,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88441964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:33,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562581042] [2022-12-14 09:06:33,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:06:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:33,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:33,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12645f43-a545-4336-b56c-d24c9a6833d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:06:33,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:06:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:06:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 09:06:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:33,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-12-14 09:06:33,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:06:33,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 09:06:33,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-12-14 09:06:33,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 09:06:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-12-14 09:06:33,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 09:06:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-12-14 09:06:33,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-12-14 09:06:33,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:33,823 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-12-14 09:06:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 57 [2022-12-14 09:06:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:34,095 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-12-14 09:06:34,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 51 [2022-12-14 09:06:34,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:34,226 INFO L321 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2022-12-14 09:06:34,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 71 treesize of output 77 [2022-12-14 09:06:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:06:34,596 INFO L321 Elim1Store]: treesize reduction 226, result has 39.9 percent of original size [2022-12-14 09:06:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 205 [2022-12-14 09:06:37,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:06:37,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 161 treesize of output 281 [2022-12-14 09:06:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:06:38,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:02,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:02,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1004 treesize of output 812 [2022-12-14 09:07:02,683 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int) (v_ArrVal_683 Int) (|v_ULTIMATE.start_main_~i~0#1_374| Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_688 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse8 .cse5 (+ (select .cse9 .cse5) (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_378|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_683))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ 1 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_374|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_688)) (.cse0 (+ c_~N~0 2))) (or (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))) (= (select .cse1 .cse2) .cse0) (< (+ |v_ULTIMATE.start_main_~i~0#1_378| 1) c_~N~0) (< (+ |v_ULTIMATE.start_main_~i~0#1_374| 1) c_~N~0))))) (not (< 1 c_~N~0))) is different from false [2022-12-14 09:07:05,633 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_378| Int) (v_ArrVal_673 Int) (v_ArrVal_683 Int) (|v_ULTIMATE.start_main_~i~0#1_374| Int) (v_arrayElimArr_1 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_386| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_688 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_386|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_673)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse8 .cse5 (+ (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse9 .cse5))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_378|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_683))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_374|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_688))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))) (or (not (< 3 .cse0)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_386|) .cse0) (not (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_386|) .cse0)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_374|) .cse0) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_378|) .cse0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_386|)) (= .cse0 (select .cse1 .cse2))))))) is different from false [2022-12-14 09:07:05,727 INFO L321 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-12-14 09:07:05,727 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 9180 treesize of output 2980 [2022-12-14 09:07:05,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:05,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56308 treesize of output 51800 [2022-12-14 09:07:06,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:06,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53117 treesize of output 48095 [2022-12-14 09:07:07,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:07,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 30590 treesize of output 28786