./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS --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 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 --- 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-8393723 [2022-11-19 06:33:57,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:33:57,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:33:57,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:33:57,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:33:57,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:33:57,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:33:57,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:33:57,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:33:57,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:33:57,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:33:57,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:33:57,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:33:57,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:33:57,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:33:57,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:33:57,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:33:57,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:33:57,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:33:57,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:33:57,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:33:57,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:33:57,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:33:57,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:33:57,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:33:57,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:33:57,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:33:57,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:33:57,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:33:57,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:33:57,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:33:57,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:33:57,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:33:57,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:33:57,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:33:57,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:33:57,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:33:57,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:33:57,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:33:57,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:33:57,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:33:57,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:33:57,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:33:57,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:33:57,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:33:57,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:33:57,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:33:57,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:33:57,298 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:33:57,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:33:57,299 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:33:57,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:33:57,299 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:33:57,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:33:57,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:33:57,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:33:57,300 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:33:57,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:33:57,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:33:57,301 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:33:57,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:33:57,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:33:57,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:33:57,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:33:57,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:33:57,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:33:57,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:33:57,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:33:57,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:33:57,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:33:57,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:33:57,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:33:57,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:33:57,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:33:57,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:33:57,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:33:57,306 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:33:57,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:33:57,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:33:57,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:33:57,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:33:57,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:33:57,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:33:57,308 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_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 [2022-11-19 06:33:57,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:33:57,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:33:57,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:33:57,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:33:57,651 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:33:57,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2022-11-19 06:33:57,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/data/008032512/160b6cea3a6345bfbd5f2082116042d2/FLAG63e9f274b [2022-11-19 06:33:58,231 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:33:58,232 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2022-11-19 06:33:58,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/data/008032512/160b6cea3a6345bfbd5f2082116042d2/FLAG63e9f274b [2022-11-19 06:33:58,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/data/008032512/160b6cea3a6345bfbd5f2082116042d2 [2022-11-19 06:33:58,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:33:58,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:33:58,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:33:58,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:33:58,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:33:58,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:58" (1/1) ... [2022-11-19 06:33:58,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:58, skipping insertion in model container [2022-11-19 06:33:58,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:58" (1/1) ... [2022-11-19 06:33:58,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:33:58,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:33:58,877 WARN L234 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_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2022-11-19 06:33:58,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:00,611 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:34:00,632 WARN L234 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_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2022-11-19 06:34:00,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:00,656 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:34:00,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00 WrapperNode [2022-11-19 06:34:00,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:00,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:00,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:34:00,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:34:00,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,699 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-19 06:34:00,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:00,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:34:00,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:34:00,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:34:00,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:34:00,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:34:00,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:34:00,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:34:00,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (1/1) ... [2022-11-19 06:34:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:00,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:34:00,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:34:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:34:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:34:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:34:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:34:00,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:34:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:34:00,931 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:34:00,933 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:34:01,076 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:34:01,106 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:34:01,107 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:34:01,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:01 BoogieIcfgContainer [2022-11-19 06:34:01,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:34:01,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:34:01,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:34:01,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:34:01,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:33:58" (1/3) ... [2022-11-19 06:34:01,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63216ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:01, skipping insertion in model container [2022-11-19 06:34:01,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:00" (2/3) ... [2022-11-19 06:34:01,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63216ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:01, skipping insertion in model container [2022-11-19 06:34:01,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:01" (3/3) ... [2022-11-19 06:34:01,119 INFO L112 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2022-11-19 06:34:01,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:34:01,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:34:01,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:34:01,264 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;@5b29447f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:34:01,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:34:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:34:01,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:01,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:34:01,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash 73548118, now seen corresponding path program 1 times [2022-11-19 06:34:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250535180] [2022-11-19 06:34:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:01,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:01,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:01,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250535180] [2022-11-19 06:34:01,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250535180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:01,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:34:01,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:34:01,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639634207] [2022-11-19 06:34:01,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:34:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:34:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:34:01,537 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-19 06:34:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:01,576 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-19 06:34:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:34:01,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-19 06:34:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:01,587 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:34:01,587 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:34:01,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:34:01,593 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:01,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:34:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:34:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2022-11-19 06:34:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-19 06:34:01,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-19 06:34:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:01,628 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-19 06:34:01,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-19 06:34:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-19 06:34:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:34:01,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:01,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:34:01,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:34:01,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2017898072, now seen corresponding path program 1 times [2022-11-19 06:34:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441960255] [2022-11-19 06:34:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:01,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:01,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441960255] [2022-11-19 06:34:01,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441960255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851007570] [2022-11-19 06:34:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:01,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:01,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:01,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:34:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:34:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:01,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:01,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851007570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:01,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794774727] [2022-11-19 06:34:01,890 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:34:01,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:01,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:01,900 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:01,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:02,010 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 22 treesize of output 22 [2022-11-19 06:34:02,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:34:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:02,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 173 [2022-11-19 06:34:02,326 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 18 treesize of output 14 [2022-11-19 06:34:02,351 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:02,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:34:02,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:02,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:34:02,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:34:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516715578] [2022-11-19 06:34:02,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:02,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:34:02,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:34:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:34:02,528 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:02,596 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-19 06:34:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:34:02,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:34:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:02,597 INFO L225 Difference]: With dead ends: 32 [2022-11-19 06:34:02,598 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 06:34:02,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:34:02,599 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:02,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 06:34:02,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2022-11-19 06:34:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-19 06:34:02,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-19 06:34:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:02,604 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-19 06:34:02,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-19 06:34:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:34:02,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:02,606 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-19 06:34:02,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:02,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1446197802, now seen corresponding path program 2 times [2022-11-19 06:34:02,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:02,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242986723] [2022-11-19 06:34:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:03,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242986723] [2022-11-19 06:34:03,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242986723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:03,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155407749] [2022-11-19 06:34:03,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:34:03,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:03,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:03,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:34:03,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:34:03,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:03,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:34:03,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:03,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:03,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155407749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:03,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [169108657] [2022-11-19 06:34:03,249 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:34:03,249 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:03,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:03,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:03,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:03,268 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 22 treesize of output 22 [2022-11-19 06:34:03,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:34:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:03,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 177 [2022-11-19 06:34:03,422 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 18 treesize of output 14 [2022-11-19 06:34:03,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:03,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:34:03,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:03,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:34:03,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 06:34:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553883941] [2022-11-19 06:34:03,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:34:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:34:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:34:03,548 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:03,632 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-11-19 06:34:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:34:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:34:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:03,634 INFO L225 Difference]: With dead ends: 68 [2022-11-19 06:34:03,635 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 06:34:03,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:34:03,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:03,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 06:34:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2022-11-19 06:34:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-19 06:34:03,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-11-19 06:34:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:03,650 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-19 06:34:03,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-19 06:34:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:34:03,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:03,651 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-19 06:34:03,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:03,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash -72035178, now seen corresponding path program 3 times [2022-11-19 06:34:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:03,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549554535] [2022-11-19 06:34:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:04,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:04,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549554535] [2022-11-19 06:34:04,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549554535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:04,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995697448] [2022-11-19 06:34:04,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:34:04,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:04,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:04,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:34:04,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:34:04,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:34:04,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:34:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:04,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995697448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762479952] [2022-11-19 06:34:04,671 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:34:04,671 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:04,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:04,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:04,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:04,694 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 22 treesize of output 22 [2022-11-19 06:34:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-19 06:34:04,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:04,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 170 [2022-11-19 06:34:04,891 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 18 treesize of output 14 [2022-11-19 06:34:04,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:05,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:34:05,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:05,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:34:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 06:34:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753321724] [2022-11-19 06:34:05,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:05,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:34:05,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:05,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:34:05,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:34:05,023 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:05,283 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-11-19 06:34:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:34:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 06:34:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:05,286 INFO L225 Difference]: With dead ends: 140 [2022-11-19 06:34:05,286 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 06:34:05,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:34:05,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:05,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:34:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 06:34:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2022-11-19 06:34:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2022-11-19 06:34:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-19 06:34:05,305 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-11-19 06:34:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:05,306 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-19 06:34:05,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-19 06:34:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 06:34:05,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:05,308 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-11-19 06:34:05,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:05,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1175372310, now seen corresponding path program 4 times [2022-11-19 06:34:05,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:05,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424553929] [2022-11-19 06:34:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:06,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424553929] [2022-11-19 06:34:06,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424553929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:06,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960925165] [2022-11-19 06:34:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:34:06,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:06,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:06,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:34:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:06,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:34:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:06,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:07,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960925165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:07,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261477717] [2022-11-19 06:34:07,505 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:34:07,505 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:07,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:07,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:07,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:07,524 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 22 treesize of output 22 [2022-11-19 06:34:07,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-19 06:34:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:07,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 172 [2022-11-19 06:34:07,643 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 18 treesize of output 14 [2022-11-19 06:34:07,654 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:07,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:34:07,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:34:07,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:34:07,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-19 06:34:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772623850] [2022-11-19 06:34:07,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:34:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 06:34:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 06:34:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:34:07,768 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:08,284 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2022-11-19 06:34:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 06:34:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 06:34:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:08,287 INFO L225 Difference]: With dead ends: 284 [2022-11-19 06:34:08,287 INFO L226 Difference]: Without dead ends: 279 [2022-11-19 06:34:08,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:34:08,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:08,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:34:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-19 06:34:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2022-11-19 06:34:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-19 06:34:08,300 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-11-19 06:34:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:08,301 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-19 06:34:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:34:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-19 06:34:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 06:34:08,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:08,303 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-11-19 06:34:08,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:08,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:08,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:08,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1077533974, now seen corresponding path program 5 times [2022-11-19 06:34:08,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:08,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310266036] [2022-11-19 06:34:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:08,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:34:10,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310266036] [2022-11-19 06:34:10,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310266036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634357502] [2022-11-19 06:34:10,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:34:10,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:10,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:10,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:38:09,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-19 06:38:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:09,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 06:38:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:10,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:13,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634357502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [616697395] [2022-11-19 06:38:13,139 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:38:13,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:13,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:13,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:13,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:13,155 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 22 treesize of output 22 [2022-11-19 06:38:13,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:38:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:13,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 175 [2022-11-19 06:38:13,307 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 18 treesize of output 14 [2022-11-19 06:38:13,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:13,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:13,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:13,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:13,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-19 06:38:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253194868] [2022-11-19 06:38:13,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-19 06:38:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-19 06:38:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 06:38:13,459 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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) [2022-11-19 06:38:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:15,747 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2022-11-19 06:38:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 06:38:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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 51 [2022-11-19 06:38:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:15,751 INFO L225 Difference]: With dead ends: 572 [2022-11-19 06:38:15,752 INFO L226 Difference]: Without dead ends: 567 [2022-11-19 06:38:15,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 06:38:15,756 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:15,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:38:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-19 06:38:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2022-11-19 06:38:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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) [2022-11-19 06:38:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-11-19 06:38:15,775 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2022-11-19 06:38:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:15,776 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-11-19 06:38:15,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 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) [2022-11-19 06:38:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-11-19 06:38:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 06:38:15,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:15,779 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2022-11-19 06:38:15,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:15,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1662184682, now seen corresponding path program 6 times [2022-11-19 06:38:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758563694] [2022-11-19 06:38:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:23,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758563694] [2022-11-19 06:38:23,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758563694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:23,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861267391] [2022-11-19 06:38:23,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:38:23,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:23,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:23,061 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:23,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:38:23,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:38:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 06:38:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:23,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:35,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861267391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316487314] [2022-11-19 06:38:35,362 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:38:35,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:35,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:35,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:35,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:35,381 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 22 treesize of output 22 [2022-11-19 06:38:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:38:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:35,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 177 [2022-11-19 06:38:35,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:38:35,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:35,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:35,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:35,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:35,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-19 06:38:35,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069003919] [2022-11-19 06:38:35,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:35,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-19 06:38:35,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-19 06:38:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 06:38:35,721 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 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) [2022-11-19 06:38:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:57,528 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2022-11-19 06:38:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 06:38:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 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 99 [2022-11-19 06:38:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:57,534 INFO L225 Difference]: With dead ends: 1148 [2022-11-19 06:38:57,534 INFO L226 Difference]: Without dead ends: 1143 [2022-11-19 06:38:57,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 06:38:57,541 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:57,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:38:57,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-11-19 06:38:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2022-11-19 06:38:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 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) [2022-11-19 06:38:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-11-19 06:38:57,567 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2022-11-19 06:38:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:57,568 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-11-19 06:38:57,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 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) [2022-11-19 06:38:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-11-19 06:38:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-19 06:38:57,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:57,576 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2022-11-19 06:38:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:57,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 197623574, now seen corresponding path program 7 times [2022-11-19 06:38:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:57,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524325451] [2022-11-19 06:38:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:39:23,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:23,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524325451] [2022-11-19 06:39:23,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524325451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:23,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110120224] [2022-11-19 06:39:23,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:39:23,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:23,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:23,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:39:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 2138 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-19 06:39:24,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:39:25,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:40:13,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110120224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166842551] [2022-11-19 06:40:13,266 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 06:40:13,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:13,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:13,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:13,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:13,281 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 22 treesize of output 22 [2022-11-19 06:40:13,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-19 06:40:13,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:13,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 172 [2022-11-19 06:40:13,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:40:13,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:13,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6993#(and (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 100 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= 100 |ULTIMATE.start_main_#t~mem4#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:13,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:13,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:13,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-19 06:40:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091600875] [2022-11-19 06:40:13,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-19 06:40:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:13,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-19 06:40:13,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 06:40:13,654 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 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) [2022-11-19 06:45:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:45:31,638 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2022-11-19 06:45:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-19 06:45:31,639 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 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 195 [2022-11-19 06:45:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:45:31,646 INFO L225 Difference]: With dead ends: 2300 [2022-11-19 06:45:31,647 INFO L226 Difference]: Without dead ends: 2295 [2022-11-19 06:45:31,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 06:45:31,659 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2364 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:45:31,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3514 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2364 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 06:45:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-11-19 06:45:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2022-11-19 06:45:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 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) [2022-11-19 06:45:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2022-11-19 06:45:31,693 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2022-11-19 06:45:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:45:31,694 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2022-11-19 06:45:31,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 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) [2022-11-19 06:45:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2022-11-19 06:45:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-19 06:45:31,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:45:31,703 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2022-11-19 06:45:31,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:45:31,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:45:31,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:45:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:45:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1598838550, now seen corresponding path program 8 times [2022-11-19 06:45:31,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:45:31,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760599569] [2022-11-19 06:45:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:45:31,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:45:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:47:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:47:03,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:47:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760599569] [2022-11-19 06:47:03,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760599569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:47:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581660594] [2022-11-19 06:47:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:47:03,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:47:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:47:03,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:47:03,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10d53733-3bb5-4f1a-a3ee-c808e3c0df2f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process