./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur --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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- 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-38b53e6 [2022-11-25 22:33:15,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:33:15,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:33:15,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:33:15,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:33:15,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:33:15,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:33:15,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:33:15,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:33:15,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:33:15,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:33:15,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:33:15,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:33:15,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:33:16,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:33:16,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:33:16,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:33:16,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:33:16,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:33:16,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:33:16,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:33:16,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:33:16,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:33:16,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:33:16,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:33:16,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:33:16,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:33:16,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:33:16,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:33:16,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:33:16,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:33:16,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:33:16,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:33:16,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:33:16,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:33:16,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:33:16,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:33:16,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:33:16,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:33:16,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:33:16,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:33:16,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:33:16,053 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:33:16,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:33:16,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:33:16,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:33:16,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:33:16,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:33:16,056 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:33:16,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:33:16,056 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:33:16,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:33:16,057 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:33:16,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:33:16,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:33:16,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:33:16,058 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:33:16,058 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:33:16,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:33:16,058 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:33:16,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:33:16,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:33:16,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:33:16,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:33:16,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:33:16,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:33:16,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:33:16,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:33:16,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:33:16,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:33:16,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:33:16,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:33:16,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:33:16,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:33:16,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:33:16,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:33:16,063 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:33:16,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:33:16,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:33:16,064 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:33:16,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:33:16,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:33:16,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:33:16,065 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_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2022-11-25 22:33:16,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:33:16,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:33:16,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:33:16,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:33:16,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:33:16,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-11-25 22:33:19,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:33:19,865 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:33:19,865 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-11-25 22:33:19,874 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/data/42a5660d9/c88d166f869540eda719e64c490dc1db/FLAGfa9da6a9b [2022-11-25 22:33:20,134 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/data/42a5660d9/c88d166f869540eda719e64c490dc1db [2022-11-25 22:33:20,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:33:20,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:33:20,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:33:20,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:33:20,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:33:20,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed275d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20, skipping insertion in model container [2022-11-25 22:33:20,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:33:20,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:33:20,342 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_106dbe72-1f29-42ef-89da-659f6db250cf/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-11-25 22:33:20,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:33:20,401 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:33:20,413 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_106dbe72-1f29-42ef-89da-659f6db250cf/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-11-25 22:33:20,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:33:20,436 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:33:20,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20 WrapperNode [2022-11-25 22:33:20,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:33:20,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:33:20,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:33:20,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:33:20,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,472 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2022-11-25 22:33:20,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:33:20,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:33:20,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:33:20,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:33:20,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,497 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:33:20,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:33:20,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:33:20,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:33:20,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (1/1) ... [2022-11-25 22:33:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:33:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:20,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:33:20,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:33:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:33:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:33:20,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:33:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:33:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:33:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:33:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:33:20,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:33:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:33:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:33:20,677 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:33:20,686 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:33:20,959 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:33:21,013 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:33:21,014 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 22:33:21,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:33:21 BoogieIcfgContainer [2022-11-25 22:33:21,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:33:21,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:33:21,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:33:21,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:33:21,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:33:20" (1/3) ... [2022-11-25 22:33:21,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0e564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:33:21, skipping insertion in model container [2022-11-25 22:33:21,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:33:20" (2/3) ... [2022-11-25 22:33:21,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b0e564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:33:21, skipping insertion in model container [2022-11-25 22:33:21,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:33:21" (3/3) ... [2022-11-25 22:33:21,027 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2022-11-25 22:33:21,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:33:21,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:33:21,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:33:21,106 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;@4f66d1d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:33:21,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:33:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 22:33:21,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:21,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:21,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:21,129 INFO L85 PathProgramCache]: Analyzing trace with hash 958502, now seen corresponding path program 1 times [2022-11-25 22:33:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:21,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344281082] [2022-11-25 22:33:21,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:21,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:21,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130267507] [2022-11-25 22:33:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:21,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:21,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:21,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:21,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:33:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:33:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:33:21,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:33:21,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:21,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344281082] [2022-11-25 22:33:21,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130267507] [2022-11-25 22:33:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130267507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:21,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:21,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:33:21,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626629814] [2022-11-25 22:33:21,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:21,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:33:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:33:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:21,572 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:21,682 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2022-11-25 22:33:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:33:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-25 22:33:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:21,693 INFO L225 Difference]: With dead ends: 37 [2022-11-25 22:33:21,694 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 22:33:21,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:21,704 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:21,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 22:33:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2022-11-25 22:33:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-25 22:33:21,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 14 [2022-11-25 22:33:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:21,748 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-25 22:33:21,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-25 22:33:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:33:21,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:21,750 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:21,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:21,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 22:33:21,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash 885154967, now seen corresponding path program 1 times [2022-11-25 22:33:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:21,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577166457] [2022-11-25 22:33:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:21,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:21,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574294863] [2022-11-25 22:33:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:21,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:21,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:22,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:33:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:33:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:33:22,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:33:22,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577166457] [2022-11-25 22:33:22,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:22,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574294863] [2022-11-25 22:33:22,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574294863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:22,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:33:22,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:33:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366350237] [2022-11-25 22:33:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:22,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:33:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:33:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:22,192 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:22,280 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-11-25 22:33:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:33:22,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-11-25 22:33:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:22,282 INFO L225 Difference]: With dead ends: 36 [2022-11-25 22:33:22,282 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 22:33:22,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:33:22,284 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:22,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 22:33:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-11-25 22:33:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-25 22:33:22,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 16 [2022-11-25 22:33:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:22,294 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-25 22:33:22,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-25 22:33:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:33:22,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:22,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:22,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:22,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -690883628, now seen corresponding path program 1 times [2022-11-25 22:33:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:22,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700284772] [2022-11-25 22:33:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:22,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169945685] [2022-11-25 22:33:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:22,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:22,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:22,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:22,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:33:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:22,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:22,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:33:22,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:33:22,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700284772] [2022-11-25 22:33:22,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169945685] [2022-11-25 22:33:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169945685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:22,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915112319] [2022-11-25 22:33:22,857 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 22:33:22,857 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:22,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:22,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:22,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,037 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:33:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:33:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,196 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:23,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:23,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:33:23,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:23,983 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:33:23,984 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:33:24,141 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 21 treesize of output 17 [2022-11-25 22:33:24,244 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 21 treesize of output 17 [2022-11-25 22:33:24,300 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 21 treesize of output 17 [2022-11-25 22:33:24,343 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 21 treesize of output 17 [2022-11-25 22:33:24,505 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 17 treesize of output 13 [2022-11-25 22:33:24,561 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 21 treesize of output 17 [2022-11-25 22:33:24,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:24,743 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:26,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [915112319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:33:26,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:26,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 14 [2022-11-25 22:33:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913284505] [2022-11-25 22:33:26,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:33:26,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:33:26,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:26,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:33:26,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:33:26,250 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:27,280 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-25 22:33:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:33:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-25 22:33:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:27,281 INFO L225 Difference]: With dead ends: 35 [2022-11-25 22:33:27,282 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 22:33:27,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:27,283 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:27,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:33:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 22:33:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-11-25 22:33:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-25 22:33:27,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2022-11-25 22:33:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:27,329 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-25 22:33:27,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-25 22:33:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:33:27,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:27,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:27,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:27,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash -853688222, now seen corresponding path program 1 times [2022-11-25 22:33:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438727929] [2022-11-25 22:33:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:27,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275755348] [2022-11-25 22:33:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:27,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:27,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:33:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:27,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:33:27,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:33:27,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:27,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438727929] [2022-11-25 22:33:27,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:27,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275755348] [2022-11-25 22:33:27,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275755348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:27,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764123533] [2022-11-25 22:33:27,763 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:27,763 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:27,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:27,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:27,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:27,876 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:27,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:27,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:33:28,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:28,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:33:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:28,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:28,405 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:33:28,405 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:33:28,642 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 21 treesize of output 17 [2022-11-25 22:33:28,746 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 21 treesize of output 17 [2022-11-25 22:33:28,817 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 21 treesize of output 17 [2022-11-25 22:33:28,856 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 21 treesize of output 17 [2022-11-25 22:33:28,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:28,941 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:33:28,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:33:29,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:29,083 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-25 22:33:29,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-11-25 22:33:29,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:29,196 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:29,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:29,254 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:29,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:29,453 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 21 treesize of output 17 [2022-11-25 22:33:29,497 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 21 treesize of output 17 [2022-11-25 22:33:29,535 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 21 treesize of output 17 [2022-11-25 22:33:29,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:29,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:31,045 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:31,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:31,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 22:33:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797448523] [2022-11-25 22:33:31,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:31,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:33:31,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:33:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:31,048 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:31,270 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2022-11-25 22:33:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:31,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-25 22:33:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:31,275 INFO L225 Difference]: With dead ends: 72 [2022-11-25 22:33:31,275 INFO L226 Difference]: Without dead ends: 57 [2022-11-25 22:33:31,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:33:31,279 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:31,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 26 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-25 22:33:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2022-11-25 22:33:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-25 22:33:31,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2022-11-25 22:33:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:31,324 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-25 22:33:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-25 22:33:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:33:31,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:31,325 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:31,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:31,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:31,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1062684031, now seen corresponding path program 2 times [2022-11-25 22:33:31,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:31,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265804998] [2022-11-25 22:33:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:31,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:31,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144834142] [2022-11-25 22:33:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:33:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:31,548 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:31,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:33:31,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:33:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:31,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:33:31,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:33:31,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:31,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265804998] [2022-11-25 22:33:31,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144834142] [2022-11-25 22:33:31,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144834142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:31,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085243344] [2022-11-25 22:33:31,747 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:31,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:31,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:31,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:31,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,820 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:33:31,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:33:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:31,939 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:33:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:32,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:32,367 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:33:32,367 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:33:32,573 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 21 treesize of output 17 [2022-11-25 22:33:32,687 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 21 treesize of output 17 [2022-11-25 22:33:32,740 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 21 treesize of output 17 [2022-11-25 22:33:32,779 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 21 treesize of output 17 [2022-11-25 22:33:32,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:32,853 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:33:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:33:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:33,009 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-25 22:33:33,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-11-25 22:33:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:33,125 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:33,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:33,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:33,189 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:33,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:33,367 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 21 treesize of output 17 [2022-11-25 22:33:33,405 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 21 treesize of output 17 [2022-11-25 22:33:33,443 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 21 treesize of output 17 [2022-11-25 22:33:33,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:33,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:34,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:34,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:34,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:34,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 22:33:34,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66637168] [2022-11-25 22:33:34,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:34,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:33:34,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:33:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:34,986 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:35,202 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2022-11-25 22:33:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-11-25 22:33:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:35,207 INFO L225 Difference]: With dead ends: 80 [2022-11-25 22:33:35,207 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 22:33:35,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:33:35,208 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:35,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 24 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 22:33:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2022-11-25 22:33:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-25 22:33:35,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 23 [2022-11-25 22:33:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:35,238 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-25 22:33:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-25 22:33:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 22:33:35,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:35,239 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:35,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:35,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:35,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1211192102, now seen corresponding path program 3 times [2022-11-25 22:33:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:35,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526014774] [2022-11-25 22:33:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:35,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:35,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305325552] [2022-11-25 22:33:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:33:35,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:35,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:35,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:35,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:33:35,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:33:35,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:33:35,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:33:35,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:35,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526014774] [2022-11-25 22:33:35,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:35,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305325552] [2022-11-25 22:33:35,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305325552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:35,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670689201] [2022-11-25 22:33:35,595 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:35,596 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:35,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:35,596 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:35,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:35,690 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:33:35,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:33:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:35,788 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:35,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:36,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:33:36,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:36,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,176 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:33:36,177 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:33:36,339 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 21 treesize of output 17 [2022-11-25 22:33:36,415 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 21 treesize of output 17 [2022-11-25 22:33:36,452 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 21 treesize of output 17 [2022-11-25 22:33:36,486 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 21 treesize of output 17 [2022-11-25 22:33:36,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,554 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:36,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,678 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:33:36,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:33:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,743 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:36,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:36,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:36,793 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:36,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:36,937 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 17 treesize of output 13 [2022-11-25 22:33:36,971 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 21 treesize of output 17 [2022-11-25 22:33:37,035 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:37,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:38,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:38,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:38,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:38,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-25 22:33:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825550759] [2022-11-25 22:33:38,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:38,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:33:38,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:33:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:33:38,369 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:38,540 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-11-25 22:33:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:33:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-25 22:33:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:38,541 INFO L225 Difference]: With dead ends: 52 [2022-11-25 22:33:38,541 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 22:33:38,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:33:38,543 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:38,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 19 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 22:33:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-25 22:33:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 22:33:38,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 29 [2022-11-25 22:33:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:38,586 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 22:33:38,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 22:33:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 22:33:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 22:33:38,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:38,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:38,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:33:38,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -203748905, now seen corresponding path program 4 times [2022-11-25 22:33:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208205430] [2022-11-25 22:33:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:38,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:38,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532059594] [2022-11-25 22:33:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:33:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:38,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:38,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:33:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:33:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 22:33:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 22:33:39,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208205430] [2022-11-25 22:33:39,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532059594] [2022-11-25 22:33:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532059594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303160652] [2022-11-25 22:33:39,071 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:39,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:39,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:39,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:39,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,140 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:33:39,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:33:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,247 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:39,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:33:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:39,607 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:33:39,608 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:33:39,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 22:33:39,863 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 17 treesize of output 13 [2022-11-25 22:33:39,901 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 21 treesize of output 17 [2022-11-25 22:33:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:39,980 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:33:39,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:33:40,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:40,125 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-25 22:33:40,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-11-25 22:33:40,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:40,253 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:40,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:40,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:40,320 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:40,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:40,457 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 21 treesize of output 17 [2022-11-25 22:33:40,497 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 21 treesize of output 17 [2022-11-25 22:33:40,530 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 21 treesize of output 17 [2022-11-25 22:33:40,579 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:40,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:42,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:42,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:42,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:42,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 22:33:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299996373] [2022-11-25 22:33:42,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 22:33:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 22:33:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2022-11-25 22:33:42,136 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:42,595 INFO L93 Difference]: Finished difference Result 196 states and 273 transitions. [2022-11-25 22:33:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:33:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-25 22:33:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:42,598 INFO L225 Difference]: With dead ends: 196 [2022-11-25 22:33:42,598 INFO L226 Difference]: Without dead ends: 170 [2022-11-25 22:33:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:33:42,600 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 227 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:42,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 46 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:33:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-25 22:33:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 39. [2022-11-25 22:33:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-11-25 22:33:42,641 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2022-11-25 22:33:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:42,642 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-11-25 22:33:42,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-11-25 22:33:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 22:33:42,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:42,644 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:42,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:42,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash -96548681, now seen corresponding path program 5 times [2022-11-25 22:33:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:42,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137941627] [2022-11-25 22:33:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:42,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:42,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830148267] [2022-11-25 22:33:42,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:33:42,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:42,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:42,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:42,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:33:42,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:33:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-25 22:33:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-25 22:33:43,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:43,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137941627] [2022-11-25 22:33:43,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830148267] [2022-11-25 22:33:43,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830148267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886623426] [2022-11-25 22:33:43,134 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:43,141 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:43,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:43,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:43,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,245 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:43,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:33:43,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:33:43,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:43,681 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:33:43,682 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:33:43,781 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 21 treesize of output 17 [2022-11-25 22:33:43,861 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 17 treesize of output 13 [2022-11-25 22:33:43,915 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 21 treesize of output 17 [2022-11-25 22:33:44,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:44,020 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:44,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:44,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:44,113 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:33:44,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:33:44,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:44,177 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:44,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:44,225 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:44,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:44,371 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 21 treesize of output 17 [2022-11-25 22:33:44,410 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 21 treesize of output 17 [2022-11-25 22:33:44,442 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 21 treesize of output 17 [2022-11-25 22:33:44,497 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:44,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:45,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2370#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:45,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:45,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:45,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 22:33:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470839772] [2022-11-25 22:33:45,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:45,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:33:45,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:33:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:45,818 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:46,051 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2022-11-25 22:33:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-25 22:33:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:46,053 INFO L225 Difference]: With dead ends: 125 [2022-11-25 22:33:46,053 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 22:33:46,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:33:46,054 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:46,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 29 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 22:33:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2022-11-25 22:33:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-11-25 22:33:46,149 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 38 [2022-11-25 22:33:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:46,149 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-11-25 22:33:46,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-11-25 22:33:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 22:33:46,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:46,162 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:46,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:46,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:46,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -281535766, now seen corresponding path program 6 times [2022-11-25 22:33:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:46,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748249258] [2022-11-25 22:33:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:46,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:46,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899846291] [2022-11-25 22:33:46,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:33:46,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:46,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:46,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:46,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:33:46,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:33:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:33:46,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 22:33:46,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-11-25 22:33:47,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748249258] [2022-11-25 22:33:47,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899846291] [2022-11-25 22:33:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899846291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706297652] [2022-11-25 22:33:47,231 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:47,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:47,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:47,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:47,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:47,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,322 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:47,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:33:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:33:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:47,633 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:33:47,633 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:33:47,742 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 21 treesize of output 17 [2022-11-25 22:33:47,810 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 17 treesize of output 13 [2022-11-25 22:33:47,858 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 21 treesize of output 17 [2022-11-25 22:33:47,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:47,925 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:33:47,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:33:48,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,054 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-25 22:33:48,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-11-25 22:33:48,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,176 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:48,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:48,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:48,246 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:48,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:48,358 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 21 treesize of output 17 [2022-11-25 22:33:48,400 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 21 treesize of output 17 [2022-11-25 22:33:48,428 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 21 treesize of output 17 [2022-11-25 22:33:48,473 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:48,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:50,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3217#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:50,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:50,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:50,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-11-25 22:33:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998827828] [2022-11-25 22:33:50,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:33:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:33:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:33:50,227 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:33:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:50,732 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-11-25 22:33:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:33:50,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2022-11-25 22:33:50,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:50,734 INFO L225 Difference]: With dead ends: 159 [2022-11-25 22:33:50,734 INFO L226 Difference]: Without dead ends: 139 [2022-11-25 22:33:50,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:33:50,736 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 147 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:50,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 64 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:33:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-25 22:33:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2022-11-25 22:33:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2022-11-25 22:33:50,812 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 74 [2022-11-25 22:33:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:50,812 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2022-11-25 22:33:50,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 22:33:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2022-11-25 22:33:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 22:33:50,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:50,814 INFO L195 NwaCegarLoop]: trace histogram [50, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:50,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:33:51,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1263812091, now seen corresponding path program 7 times [2022-11-25 22:33:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175699332] [2022-11-25 22:33:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:51,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678123632] [2022-11-25 22:33:51,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:33:51,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:51,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:51,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:51,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:33:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:51,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:33:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-11-25 22:33:51,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-11-25 22:33:51,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:51,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175699332] [2022-11-25 22:33:51,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:51,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678123632] [2022-11-25 22:33:51,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678123632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:51,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161138159] [2022-11-25 22:33:51,649 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:51,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:51,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:51,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:51,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:51,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,749 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:51,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:33:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:51,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:33:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,079 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:33:52,079 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:33:52,179 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 21 treesize of output 17 [2022-11-25 22:33:52,256 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 17 treesize of output 13 [2022-11-25 22:33:52,283 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 21 treesize of output 17 [2022-11-25 22:33:52,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,370 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:52,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:52,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,476 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:33:52,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:33:52,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,544 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:52,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:52,599 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:52,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:52,733 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 21 treesize of output 17 [2022-11-25 22:33:52,773 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 21 treesize of output 17 [2022-11-25 22:33:52,810 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 21 treesize of output 17 [2022-11-25 22:33:52,862 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:52,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:54,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4237#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:54,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:54,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:54,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-25 22:33:54,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111180359] [2022-11-25 22:33:54,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:33:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:33:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:33:54,248 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:55,602 INFO L93 Difference]: Finished difference Result 515 states and 725 transitions. [2022-11-25 22:33:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:33:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 86 [2022-11-25 22:33:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:55,604 INFO L225 Difference]: With dead ends: 515 [2022-11-25 22:33:55,605 INFO L226 Difference]: Without dead ends: 446 [2022-11-25 22:33:55,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:33:55,608 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 406 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:55,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 84 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:33:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-25 22:33:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 147. [2022-11-25 22:33:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 143 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2022-11-25 22:33:55,768 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 86 [2022-11-25 22:33:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:55,768 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2022-11-25 22:33:55,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2022-11-25 22:33:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-25 22:33:55,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:55,771 INFO L195 NwaCegarLoop]: trace histogram [110, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:33:55,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:33:55,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:33:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:33:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2097720251, now seen corresponding path program 8 times [2022-11-25 22:33:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:33:55,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213092542] [2022-11-25 22:33:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:33:55,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:33:56,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:33:56,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696314993] [2022-11-25 22:33:56,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:33:56,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:56,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:56,030 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:56,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:33:56,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 22:33:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:33:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2022-11-25 22:33:56,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2022-11-25 22:33:56,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213092542] [2022-11-25 22:33:56,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:33:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696314993] [2022-11-25 22:33:56,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696314993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:33:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403955928] [2022-11-25 22:33:56,737 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:33:56,737 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:33:56,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:33:56,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:33:56,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:33:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:56,834 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:33:56,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:33:56,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:56,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:33:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:33:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:33:57,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,239 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:33:57,240 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:33:57,405 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 21 treesize of output 17 [2022-11-25 22:33:57,485 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 17 treesize of output 13 [2022-11-25 22:33:57,515 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 21 treesize of output 17 [2022-11-25 22:33:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,592 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:33:57,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-25 22:33:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,717 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-11-25 22:33:57,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 157 [2022-11-25 22:33:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,828 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:57,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:57,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:33:57,877 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:33:57,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:33:58,032 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 21 treesize of output 17 [2022-11-25 22:33:58,063 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 21 treesize of output 17 [2022-11-25 22:33:58,097 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 21 treesize of output 17 [2022-11-25 22:33:58,144 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:33:58,195 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:33:59,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6389#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:33:59,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:33:59,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:33:59,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 22:33:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553452658] [2022-11-25 22:33:59,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:33:59,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:33:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:33:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:33:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:33:59,361 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:33:59,613 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2022-11-25 22:33:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:33:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 146 [2022-11-25 22:33:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:33:59,622 INFO L225 Difference]: With dead ends: 192 [2022-11-25 22:33:59,622 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 22:33:59,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 418 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 22:33:59,624 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:33:59,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 22 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:33:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 22:33:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2022-11-25 22:33:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0975609756097562) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:33:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2022-11-25 22:33:59,800 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 146 [2022-11-25 22:33:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:33:59,800 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2022-11-25 22:33:59,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:33:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2022-11-25 22:33:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-25 22:33:59,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:33:59,803 INFO L195 NwaCegarLoop]: trace histogram [110, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:33:59,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:00,006 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash -886786193, now seen corresponding path program 9 times [2022-11-25 22:34:00,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:00,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040894431] [2022-11-25 22:34:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:00,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:00,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:34:00,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338766074] [2022-11-25 22:34:00,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:34:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:00,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:00,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:34:01,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:34:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:01,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:34:01,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2022-11-25 22:34:02,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2022-11-25 22:34:02,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040894431] [2022-11-25 22:34:02,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:34:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338766074] [2022-11-25 22:34:02,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338766074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870108401] [2022-11-25 22:34:02,352 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:02,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:02,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:02,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:02,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,456 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:34:02,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:34:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:34:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:34:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:02,792 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:34:02,793 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:34:02,885 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 21 treesize of output 17 [2022-11-25 22:34:02,977 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 21 treesize of output 17 [2022-11-25 22:34:03,010 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 21 treesize of output 17 [2022-11-25 22:34:03,042 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 21 treesize of output 17 [2022-11-25 22:34:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:03,107 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:03,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:03,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:03,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:03,204 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:34:03,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:34:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:03,277 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:03,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:03,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:03,324 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:03,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:03,456 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 21 treesize of output 17 [2022-11-25 22:34:03,488 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 21 treesize of output 17 [2022-11-25 22:34:03,517 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 21 treesize of output 17 [2022-11-25 22:34:03,565 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:34:03,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:04,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8051#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:04,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:04,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:34:04,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 22:34:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130171694] [2022-11-25 22:34:04,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 22:34:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 22:34:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:34:04,912 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:05,339 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2022-11-25 22:34:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:34:05,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 158 [2022-11-25 22:34:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:05,342 INFO L225 Difference]: With dead ends: 264 [2022-11-25 22:34:05,342 INFO L226 Difference]: Without dead ends: 229 [2022-11-25 22:34:05,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 448 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:34:05,343 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:05,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:34:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-25 22:34:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-11-25 22:34:05,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1067961165048543) internal successors, (228), 206 states have internal predecessors, (228), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2022-11-25 22:34:05,512 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 158 [2022-11-25 22:34:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:05,513 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2022-11-25 22:34:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2022-11-25 22:34:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-25 22:34:05,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:05,515 INFO L195 NwaCegarLoop]: trace histogram [110, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:05,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:05,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:05,726 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:05,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1601306991, now seen corresponding path program 10 times [2022-11-25 22:34:05,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:05,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533389315] [2022-11-25 22:34:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:05,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:34:05,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650651435] [2022-11-25 22:34:05,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:34:05,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:05,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:05,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:34:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:34:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2022-11-25 22:34:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2022-11-25 22:34:07,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533389315] [2022-11-25 22:34:07,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:34:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650651435] [2022-11-25 22:34:07,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650651435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463497246] [2022-11-25 22:34:07,310 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:07,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:07,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:07,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:07,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,386 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:34:07,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:34:07,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:34:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:34:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:07,702 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:34:07,703 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:34:07,792 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 21 treesize of output 17 [2022-11-25 22:34:07,859 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 17 treesize of output 13 [2022-11-25 22:34:07,897 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 21 treesize of output 17 [2022-11-25 22:34:07,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:07,968 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:34:07,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:34:08,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:08,080 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-11-25 22:34:08,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 157 [2022-11-25 22:34:08,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:08,175 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:08,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:08,238 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:08,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:08,357 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 21 treesize of output 17 [2022-11-25 22:34:08,396 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 21 treesize of output 17 [2022-11-25 22:34:08,425 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 21 treesize of output 17 [2022-11-25 22:34:08,465 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:34:08,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:09,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10100#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:09,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:09,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:34:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-25 22:34:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994742415] [2022-11-25 22:34:09,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:09,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 22:34:09,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 22:34:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 22:34:09,903 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:13,284 INFO L93 Difference]: Finished difference Result 1037 states and 1406 transitions. [2022-11-25 22:34:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 22:34:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 182 [2022-11-25 22:34:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:13,288 INFO L225 Difference]: With dead ends: 1037 [2022-11-25 22:34:13,288 INFO L226 Difference]: Without dead ends: 857 [2022-11-25 22:34:13,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 484 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:34:13,291 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 996 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 963 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:13,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 154 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:34:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-25 22:34:13,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 330. [2022-11-25 22:34:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.0674846625766872) internal successors, (348), 326 states have internal predecessors, (348), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:13,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 352 transitions. [2022-11-25 22:34:13,560 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 352 transitions. Word has length 182 [2022-11-25 22:34:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:13,560 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 352 transitions. [2022-11-25 22:34:13,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 352 transitions. [2022-11-25 22:34:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-25 22:34:13,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:13,565 INFO L195 NwaCegarLoop]: trace histogram [230, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:13,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:13,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:34:13,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash -135742225, now seen corresponding path program 11 times [2022-11-25 22:34:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274908245] [2022-11-25 22:34:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:13,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:34:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232799718] [2022-11-25 22:34:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:34:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:13,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:13,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:34:52,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-25 22:34:52,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:34:52,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:34:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2022-11-25 22:34:52,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:34:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2022-11-25 22:34:53,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274908245] [2022-11-25 22:34:53,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:34:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232799718] [2022-11-25 22:34:53,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232799718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:34:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364649470] [2022-11-25 22:34:53,485 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:34:53,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:34:53,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:34:53,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:34:53,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:34:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,587 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:34:53,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:34:53,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-25 22:34:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-25 22:34:53,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:53,962 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 22:34:53,963 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 4 case distinctions, treesize of input 391 treesize of output 384 [2022-11-25 22:34:54,149 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 21 treesize of output 17 [2022-11-25 22:34:54,225 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 17 treesize of output 13 [2022-11-25 22:34:54,254 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 21 treesize of output 17 [2022-11-25 22:34:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,332 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:54,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:34:54,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,425 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:34:54,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:34:54,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,493 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:54,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:34:54,540 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:34:54,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:34:54,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 22:34:54,717 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 21 treesize of output 17 [2022-11-25 22:34:54,771 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:34:54,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:34:56,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14550#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:34:56,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:34:56,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:34:56,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-25 22:34:56,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844200313] [2022-11-25 22:34:56,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:34:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:34:56,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:34:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:34:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:34:56,453 INFO L87 Difference]: Start difference. First operand 330 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:34:57,441 INFO L93 Difference]: Finished difference Result 528 states and 615 transitions. [2022-11-25 22:34:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:34:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 302 [2022-11-25 22:34:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:34:57,444 INFO L225 Difference]: With dead ends: 528 [2022-11-25 22:34:57,444 INFO L226 Difference]: Without dead ends: 457 [2022-11-25 22:34:57,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 868 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 22:34:57,446 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 318 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:34:57,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 79 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:34:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-25 22:34:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2022-11-25 22:34:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.0829268292682928) internal successors, (444), 410 states have internal predecessors, (444), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:34:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 448 transitions. [2022-11-25 22:34:57,800 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 448 transitions. Word has length 302 [2022-11-25 22:34:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:34:57,801 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 448 transitions. [2022-11-25 22:34:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:34:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 448 transitions. [2022-11-25 22:34:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-11-25 22:34:57,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:34:57,806 INFO L195 NwaCegarLoop]: trace histogram [230, 88, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:34:57,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:34:58,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:34:58,035 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:34:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:34:58,035 INFO L85 PathProgramCache]: Analyzing trace with hash -501681937, now seen corresponding path program 12 times [2022-11-25 22:34:58,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:34:58,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356211774] [2022-11-25 22:34:58,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:34:58,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:34:58,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:34:58,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3771459] [2022-11-25 22:34:58,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:34:58,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:58,155 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:58,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:42:57,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:42:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:42:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:42:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:42:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2651 proven. 253 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2022-11-25 22:42:59,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:43:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2122 proven. 782 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2022-11-25 22:43:00,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356211774] [2022-11-25 22:43:00,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:43:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3771459] [2022-11-25 22:43:00,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3771459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:43:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787655022] [2022-11-25 22:43:00,300 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:43:00,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:43:00,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:43:00,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:43:00,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:43:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,391 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:43:00,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:43:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,499 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:43:00,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:43:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:43:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:00,891 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:43:00,891 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:43:01,002 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 21 treesize of output 17 [2022-11-25 22:43:01,075 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 17 treesize of output 13 [2022-11-25 22:43:01,118 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 21 treesize of output 17 [2022-11-25 22:43:01,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:01,189 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-25 22:43:01,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 27 [2022-11-25 22:43:01,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:01,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:01,311 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-25 22:43:01,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2022-11-25 22:43:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:01,430 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:43:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:43:01,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:01,488 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:43:01,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:43:01,619 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 17 treesize of output 13 [2022-11-25 22:43:01,651 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 21 treesize of output 17 [2022-11-25 22:43:01,711 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:43:01,753 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:43:03,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18501#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:43:03,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:43:03,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:43:03,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-25 22:43:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761475547] [2022-11-25 22:43:03,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:43:03,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 22:43:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 22:43:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 22:43:03,360 INFO L87 Difference]: Start difference. First operand 414 states and 448 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:43:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:05,936 INFO L93 Difference]: Finished difference Result 816 states and 975 transitions. [2022-11-25 22:43:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 22:43:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 350 [2022-11-25 22:43:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:05,940 INFO L225 Difference]: With dead ends: 816 [2022-11-25 22:43:05,940 INFO L226 Difference]: Without dead ends: 673 [2022-11-25 22:43:05,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 988 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2022-11-25 22:43:05,943 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 779 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:05,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 152 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:43:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-25 22:43:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 582. [2022-11-25 22:43:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 578 states have (on average 1.1003460207612457) internal successors, (636), 578 states have internal predecessors, (636), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:43:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 640 transitions. [2022-11-25 22:43:06,702 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 640 transitions. Word has length 350 [2022-11-25 22:43:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:06,703 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 640 transitions. [2022-11-25 22:43:06,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:43:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 640 transitions. [2022-11-25 22:43:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-25 22:43:06,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:06,707 INFO L195 NwaCegarLoop]: trace histogram [230, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:06,916 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2022-11-25 22:43:06,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2022-11-25 22:43:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:06,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 560191727, now seen corresponding path program 13 times [2022-11-25 22:43:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909344509] [2022-11-25 22:43:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:07,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:43:07,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616170893] [2022-11-25 22:43:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:43:07,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:43:07,139 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:43:07,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:43:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:43:08,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3514 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 22:43:08,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:43:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2022-11-25 22:43:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:43:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2022-11-25 22:43:12,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:43:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909344509] [2022-11-25 22:43:12,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 22:43:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616170893] [2022-11-25 22:43:12,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616170893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:43:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672815445] [2022-11-25 22:43:12,291 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:43:12,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:43:12,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:43:12,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:43:12,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:43:12,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,361 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-25 22:43:12,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-25 22:43:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,444 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 22:43:12,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-25 22:43:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 22:43:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:12,740 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 22:43:12,740 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 3 case distinctions, treesize of input 399 treesize of output 382 [2022-11-25 22:43:12,827 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 21 treesize of output 17 [2022-11-25 22:43:12,908 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 21 treesize of output 17 [2022-11-25 22:43:12,945 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 21 treesize of output 17 [2022-11-25 22:43:12,967 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 21 treesize of output 17 [2022-11-25 22:43:13,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:13,025 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:43:13,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:43:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:43:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:13,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:13,144 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-25 22:43:13,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2022-11-25 22:43:13,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:13,217 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:43:13,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:43:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:43:13,261 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-25 22:43:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-25 22:43:13,394 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 17 treesize of output 13 [2022-11-25 22:43:13,441 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 21 treesize of output 17 [2022-11-25 22:43:13,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-11-25 22:43:13,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:43:15,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23904#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 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| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 22:43:15,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:43:15,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 22:43:15,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-11-25 22:43:15,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406159497] [2022-11-25 22:43:15,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 22:43:15,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-25 22:43:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:43:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-25 22:43:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4988, Invalid=6354, Unknown=0, NotChecked=0, Total=11342 [2022-11-25 22:43:15,392 INFO L87 Difference]: Start difference. First operand 582 states and 640 transitions. Second operand has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:43:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:43:27,632 INFO L93 Difference]: Finished difference Result 2117 states and 2714 transitions. [2022-11-25 22:43:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-25 22:43:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 446 [2022-11-25 22:43:27,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:43:27,639 INFO L225 Difference]: With dead ends: 2117 [2022-11-25 22:43:27,639 INFO L226 Difference]: Without dead ends: 1589 [2022-11-25 22:43:27,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1228 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6876 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=9735, Invalid=13827, Unknown=0, NotChecked=0, Total=23562 [2022-11-25 22:43:27,647 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2320 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1663 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:43:27,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2320 Valid, 299 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1663 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 22:43:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-25 22:43:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 822. [2022-11-25 22:43:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 818 states have (on average 1.0709046454767726) internal successors, (876), 818 states have internal predecessors, (876), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 22:43:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 880 transitions. [2022-11-25 22:43:28,657 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 880 transitions. Word has length 446 [2022-11-25 22:43:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:43:28,658 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 880 transitions. [2022-11-25 22:43:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 22:43:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 880 transitions. [2022-11-25 22:43:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-11-25 22:43:28,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:43:28,664 INFO L195 NwaCegarLoop]: trace histogram [470, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:43:28,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:43:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:43:28,864 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:43:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:43:28,865 INFO L85 PathProgramCache]: Analyzing trace with hash -819343377, now seen corresponding path program 14 times [2022-11-25 22:43:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:43:28,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914921679] [2022-11-25 22:43:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:43:28,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:43:29,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 22:43:29,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191749534] [2022-11-25 22:43:29,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:43:29,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:43:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:43:29,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:43:29,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106dbe72-1f29-42ef-89da-659f6db250cf/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process