./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-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_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/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_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/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_ffe01266-a23d-469f-babe-a861cfb53957/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 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 --- 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 [2022-11-26 01:01:02,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:02,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:02,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:02,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:02,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:02,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:02,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:02,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:02,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:02,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:02,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:02,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:02,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:02,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:02,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:02,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:02,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:02,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:02,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:02,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:02,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:02,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:02,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:02,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:02,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:02,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:02,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:02,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:02,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:02,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:02,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:02,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:02,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:02,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:02,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:02,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:02,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:02,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:02,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:02,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:02,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:02,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:02,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:02,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:02,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:02,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:02,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:02,658 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:02,659 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:02,659 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:02,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:02,660 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:02,661 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:02,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:02,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:02,662 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:02,662 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:02,662 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:02,662 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:02,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:02,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:02,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:02,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:02,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:02,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:02,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:02,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:02,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:02,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:02,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:02,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:02,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:02,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:02,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:02,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:02,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:02,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:02,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:02,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:02,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:02,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:02,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:02,670 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_ffe01266-a23d-469f-babe-a861cfb53957/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 [2022-11-26 01:01:02,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:02,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:02,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:02,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:02,954 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:02,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2022-11-26 01:01:06,495 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:06,685 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:06,685 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2022-11-26 01:01:06,691 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/data/07722a55c/d14ac62102cf4a0c8ff86b17ce02eb9f/FLAGfe396f9ee [2022-11-26 01:01:06,720 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/data/07722a55c/d14ac62102cf4a0c8ff86b17ce02eb9f [2022-11-26 01:01:06,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:06,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:06,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:06,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:06,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:06,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:06,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcdd5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06, skipping insertion in model container [2022-11-26 01:01:06,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:06,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:06,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:06,911 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_ffe01266-a23d-469f-babe-a861cfb53957/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2022-11-26 01:01:06,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:06,937 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:06,948 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_ffe01266-a23d-469f-babe-a861cfb53957/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2022-11-26 01:01:06,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:06,968 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:01:06,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06 WrapperNode [2022-11-26 01:01:06,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:06,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:06,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:01:06,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:01:06,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:06,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,003 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-11-26 01:01:07,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:07,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:01:07,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:01:07,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:01:07,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,024 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:01:07,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:01:07,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:01:07,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:01:07,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (1/1) ... [2022-11-26 01:01:07,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:07,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:07,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:01:07,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:01:07,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:01:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:01:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:01:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:01:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:01:07,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:01:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:01:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:01:07,183 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:01:07,185 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:01:07,343 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:01:07,383 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:01:07,384 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 01:01:07,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:07 BoogieIcfgContainer [2022-11-26 01:01:07,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:01:07,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:01:07,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:01:07,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:01:07,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:06" (1/3) ... [2022-11-26 01:01:07,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2448fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:07, skipping insertion in model container [2022-11-26 01:01:07,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:06" (2/3) ... [2022-11-26 01:01:07,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2448fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:07, skipping insertion in model container [2022-11-26 01:01:07,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:07" (3/3) ... [2022-11-26 01:01:07,398 INFO L112 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2022-11-26 01:01:07,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:01:07,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:01:07,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:01:07,478 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;@39efd994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:01:07,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:01:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:01:07,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:07,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:01:07,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1361640078, now seen corresponding path program 1 times [2022-11-26 01:01:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315238760] [2022-11-26 01:01:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:07,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371526413] [2022-11-26 01:01:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:07,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:07,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:07,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:01:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:01:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:07,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:01:07,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315238760] [2022-11-26 01:01:07,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:07,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371526413] [2022-11-26 01:01:07,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371526413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:07,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:07,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:01:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292898635] [2022-11-26 01:01:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:01:07,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:01:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:07,880 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:07,963 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-26 01:01:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:01:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:01:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:07,976 INFO L225 Difference]: With dead ends: 19 [2022-11-26 01:01:07,977 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 01:01:07,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:01:07,984 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:07,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 01:01:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-26 01:01:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-26 01:01:08,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2022-11-26 01:01:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:08,040 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-26 01:01:08,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-26 01:01:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:01:08,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:08,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:08,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:01:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:01:08,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1520320404, now seen corresponding path program 1 times [2022-11-26 01:01:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439142159] [2022-11-26 01:01:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:08,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:08,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315420713] [2022-11-26 01:01:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:08,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:08,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:08,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:01:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:01:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:08,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:01:08,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439142159] [2022-11-26 01:01:08,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315420713] [2022-11-26 01:01:08,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315420713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:08,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:08,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849342491] [2022-11-26 01:01:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:01:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:01:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:01:08,420 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:08,476 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-26 01:01:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:01:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 01:01:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:08,478 INFO L225 Difference]: With dead ends: 25 [2022-11-26 01:01:08,478 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 01:01:08,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:01:08,479 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:08,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 01:01:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2022-11-26 01:01:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-26 01:01:08,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-26 01:01:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:08,487 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-26 01:01:08,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-26 01:01:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:01:08,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:08,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:08,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:08,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-26 01:01:08,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 69801914, now seen corresponding path program 1 times [2022-11-26 01:01:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36500826] [2022-11-26 01:01:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:08,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:08,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390949986] [2022-11-26 01:01:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:08,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:08,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:01:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:08,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:01:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:08,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:08,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36500826] [2022-11-26 01:01:08,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390949986] [2022-11-26 01:01:08,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390949986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9656232] [2022-11-26 01:01:08,928 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 01:01:08,929 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:08,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:08,948 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:08,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:09,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:09,076 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 01:01:09,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 01:01:09,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:09,154 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:01:09,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 01:01:09,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:09,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 01:01:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:09,556 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 01:01:09,557 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 256 treesize of output 253 [2022-11-26 01:01:09,765 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 [2022-11-26 01:01:09,873 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 [2022-11-26 01:01:09,929 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 [2022-11-26 01:01:10,053 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 [2022-11-26 01:01:10,108 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 [2022-11-26 01:01:10,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:10,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '217#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (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~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:10,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:10,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:10,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-26 01:01:10,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919718028] [2022-11-26 01:01:10,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:01:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:01:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:01:10,605 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:10,710 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-11-26 01:01:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:01:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:01:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:10,713 INFO L225 Difference]: With dead ends: 41 [2022-11-26 01:01:10,714 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 01:01:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:01:10,720 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:10,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 01:01:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-11-26 01:01:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-26 01:01:10,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 9 [2022-11-26 01:01:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:10,733 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-26 01:01:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-26 01:01:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:01:10,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:10,734 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:10,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:10,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:10,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash -760866540, now seen corresponding path program 2 times [2022-11-26 01:01:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:10,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939851316] [2022-11-26 01:01:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:10,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:10,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:10,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491070247] [2022-11-26 01:01:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:01:10,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:10,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:10,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:01:11,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:01:11,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:01:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 01:01:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:01:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:01:11,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:11,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939851316] [2022-11-26 01:01:11,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491070247] [2022-11-26 01:01:11,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491070247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666638209] [2022-11-26 01:01:11,144 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 01:01:11,145 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:11,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:11,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:11,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,219 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 01:01:11,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 01:01:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,292 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:01:11,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 01:01:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 01:01:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:11,501 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-26 01:01:11,502 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 252 treesize of output 255 [2022-11-26 01:01:11,655 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 [2022-11-26 01:01:11,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:11,836 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-26 01:01:11,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 142 [2022-11-26 01:01:11,914 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 [2022-11-26 01:01:11,984 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 [2022-11-26 01:01:12,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 01:01:12,101 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-26 01:01:12,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2022-11-26 01:01:12,154 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 [2022-11-26 01:01:12,200 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 [2022-11-26 01:01:12,266 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-26 01:01:12,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2022-11-26 01:01:12,322 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 [2022-11-26 01:01:12,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:12,658 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (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~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:12,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:12,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:12,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-26 01:01:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975962541] [2022-11-26 01:01:12,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:01:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:01:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:01:12,661 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:12,725 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-11-26 01:01:12,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:01:12,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 01:01:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:12,729 INFO L225 Difference]: With dead ends: 58 [2022-11-26 01:01:12,730 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 01:01:12,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:01:12,733 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:12,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 13 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 01:01:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-26 01:01:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-26 01:01:12,755 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 12 [2022-11-26 01:01:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:12,756 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-26 01:01:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-26 01:01:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 01:01:12,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:12,758 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:12,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:12,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:12,964 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -165459206, now seen corresponding path program 3 times [2022-11-26 01:01:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960416266] [2022-11-26 01:01:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:12,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779048492] [2022-11-26 01:01:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:01:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:12,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:13,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:01:14,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:01:14,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:01:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:01:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-26 01:01:14,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-26 01:01:14,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960416266] [2022-11-26 01:01:14,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779048492] [2022-11-26 01:01:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779048492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:14,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87754801] [2022-11-26 01:01:14,682 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 01:01:14,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:14,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:14,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:14,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:14,752 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:01:14,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 01:01:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:14,775 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 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-26 01:01:14,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:14,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 01:01:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:14,926 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 01:01:14,927 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 256 treesize of output 253 [2022-11-26 01:01:14,995 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 [2022-11-26 01:01:15,054 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 [2022-11-26 01:01:15,075 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 21 treesize of output 17 [2022-11-26 01:01:15,139 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 [2022-11-26 01:01:15,171 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 [2022-11-26 01:01:15,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:15,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (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~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:15,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:15,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:15,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-26 01:01:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556449268] [2022-11-26 01:01:15,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:15,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:01:15,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:01:15,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:01:15,570 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:15,757 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-11-26 01:01:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:01:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-26 01:01:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:15,759 INFO L225 Difference]: With dead ends: 138 [2022-11-26 01:01:15,759 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 01:01:15,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=326, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:01:15,760 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 166 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:15,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 32 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 01:01:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2022-11-26 01:01:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-26 01:01:15,793 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 30 [2022-11-26 01:01:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:15,794 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-26 01:01:15,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-26 01:01:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 01:01:15,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:15,797 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:16,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:16,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 577256186, now seen corresponding path program 4 times [2022-11-26 01:01:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098850652] [2022-11-26 01:01:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:16,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:16,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076930214] [2022-11-26 01:01:16,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:01:16,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:16,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:16,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:16,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:01:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:01:16,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-26 01:01:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-11-26 01:01:16,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:16,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098850652] [2022-11-26 01:01:16,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076930214] [2022-11-26 01:01:16,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076930214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977477495] [2022-11-26 01:01:16,650 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 01:01:16,650 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:16,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:16,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:16,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:16,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:16,703 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 01:01:16,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 01:01:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:16,760 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:01:16,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 01:01:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:16,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 01:01:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:16,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:16,906 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-26 01:01:16,907 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 252 treesize of output 255 [2022-11-26 01:01:17,036 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 [2022-11-26 01:01:17,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:17,131 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-26 01:01:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 146 [2022-11-26 01:01:17,180 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 [2022-11-26 01:01:17,212 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 [2022-11-26 01:01:17,252 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 [2022-11-26 01:01:17,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 83 [2022-11-26 01:01:17,305 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 [2022-11-26 01:01:17,332 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 [2022-11-26 01:01:17,371 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-26 01:01:17,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2022-11-26 01:01:17,445 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 [2022-11-26 01:01:17,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:17,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1531#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (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~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:17,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:17,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:17,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-26 01:01:17,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577752118] [2022-11-26 01:01:17,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:17,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:01:17,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:01:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=531, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:01:17,796 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:18,351 INFO L93 Difference]: Finished difference Result 282 states and 362 transitions. [2022-11-26 01:01:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 01:01:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-26 01:01:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:18,358 INFO L225 Difference]: With dead ends: 282 [2022-11-26 01:01:18,359 INFO L226 Difference]: Without dead ends: 211 [2022-11-26 01:01:18,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=718, Invalid=1004, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:01:18,362 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 308 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:18,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 68 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:01:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-26 01:01:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 168. [2022-11-26 01:01:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 167 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2022-11-26 01:01:18,414 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 54 [2022-11-26 01:01:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:18,415 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2022-11-26 01:01:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2022-11-26 01:01:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-26 01:01:18,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:18,420 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:18,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:18,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:18,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -139175174, now seen corresponding path program 5 times [2022-11-26 01:01:18,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710753352] [2022-11-26 01:01:18,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:18,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:18,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441030155] [2022-11-26 01:01:18,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:01:18,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:18,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:18,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:18,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:01:59,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-26 01:01:59,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:01:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 01:01:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-11-26 01:02:00,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 4 proven. 1840 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-11-26 01:02:01,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710753352] [2022-11-26 01:02:01,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441030155] [2022-11-26 01:02:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441030155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655256488] [2022-11-26 01:02:01,290 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 01:02:01,290 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:01,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:01,291 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:01,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:01,337 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 01:02:01,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 01:02:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:01,387 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:02:01,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 01:02:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:01,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-26 01:02:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:01,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:01,534 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-26 01:02:01,534 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 252 treesize of output 255 [2022-11-26 01:02:01,659 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 [2022-11-26 01:02:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:01,755 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-26 01:02:01,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 142 [2022-11-26 01:02:01,797 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 [2022-11-26 01:02:01,845 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 [2022-11-26 01:02:01,883 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 [2022-11-26 01:02:01,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 83 [2022-11-26 01:02:01,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 01:02:01,985 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 [2022-11-26 01:02:02,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 83 [2022-11-26 01:02:02,044 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 [2022-11-26 01:02:02,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:02,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3010#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (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~mem5#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:02,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:02,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:02,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-26 01:02:02,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417901191] [2022-11-26 01:02:02,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:02,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 01:02:02,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:02,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 01:02:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1347, Invalid=1623, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 01:02:02,384 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:04,111 INFO L93 Difference]: Finished difference Result 570 states and 722 transitions. [2022-11-26 01:02:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-26 01:02:04,112 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-26 01:02:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:04,114 INFO L225 Difference]: With dead ends: 570 [2022-11-26 01:02:04,114 INFO L226 Difference]: Without dead ends: 427 [2022-11-26 01:02:04,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2566, Invalid=3440, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 01:02:04,118 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 879 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:04,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 140 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:02:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-26 01:02:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 336. [2022-11-26 01:02:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.155223880597015) internal successors, (387), 335 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 387 transitions. [2022-11-26 01:02:04,155 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 387 transitions. Word has length 102 [2022-11-26 01:02:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:04,155 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 387 transitions. [2022-11-26 01:02:04,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.22) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 387 transitions. [2022-11-26 01:02:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-26 01:02:04,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:04,158 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:04,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:02:04,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1831494918, now seen corresponding path program 6 times [2022-11-26 01:02:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678082926] [2022-11-26 01:02:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:04,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:04,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282015669] [2022-11-26 01:02:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:02:04,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:04,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:04,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffe01266-a23d-469f-babe-a861cfb53957/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process