./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0 --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 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- 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-e04fb08 [2022-11-16 20:22:03,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:22:03,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:22:03,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:22:03,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:22:03,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:22:03,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:22:03,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:22:03,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:22:03,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:22:03,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:22:03,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:22:03,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:22:03,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:22:03,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:22:03,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:22:03,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:22:03,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:22:03,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:22:03,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:22:03,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:22:03,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:22:03,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:22:03,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:22:03,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:22:03,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:22:03,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:22:03,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:22:03,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:22:03,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:22:03,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:22:03,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:22:03,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:22:03,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:22:03,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:22:03,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:22:03,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:22:03,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:22:03,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:22:03,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:22:03,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:22:03,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:22:03,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:22:03,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:22:03,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:22:03,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:22:03,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:22:03,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:22:03,384 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:22:03,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:22:03,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:22:03,385 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:22:03,385 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:22:03,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:22:03,386 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:22:03,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:22:03,386 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:22:03,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:22:03,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:22:03,387 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:22:03,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:22:03,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:22:03,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:22:03,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:22:03,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:22:03,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:22:03,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:22:03,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:22:03,390 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:22:03,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:22:03,390 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:22:03,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:22:03,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:22:03,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:22:03,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:03,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:22:03,392 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:22:03,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:22:03,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:22:03,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:22:03,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:22:03,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:22:03,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:22:03,394 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_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2022-11-16 20:22:03,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:22:03,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:22:03,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:22:03,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:22:03,765 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:22:03,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-patterns/array12_pattern.c [2022-11-16 20:22:03,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/data/bff163482/50d8c3d6261c4093afe87bba95c96fd6/FLAG10bf8333a [2022-11-16 20:22:04,507 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:22:04,510 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/sv-benchmarks/c/array-patterns/array12_pattern.c [2022-11-16 20:22:04,520 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/data/bff163482/50d8c3d6261c4093afe87bba95c96fd6/FLAG10bf8333a [2022-11-16 20:22:04,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/data/bff163482/50d8c3d6261c4093afe87bba95c96fd6 [2022-11-16 20:22:04,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:22:04,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:22:04,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:04,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:22:04,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:22:04,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:04" (1/1) ... [2022-11-16 20:22:04,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1daa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:04, skipping insertion in model container [2022-11-16 20:22:04,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:04" (1/1) ... [2022-11-16 20:22:04,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:22:04,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:22:05,117 WARN L229 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_b61df231-bf64-4db7-bcd2-32f1c4cb2023/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2022-11-16 20:22:05,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:05,149 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:22:05,164 WARN L229 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_b61df231-bf64-4db7-bcd2-32f1c4cb2023/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2022-11-16 20:22:05,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:05,208 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:22:05,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05 WrapperNode [2022-11-16 20:22:05,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:05,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:05,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:22:05,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:22:05,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,253 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2022-11-16 20:22:05,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:05,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:22:05,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:22:05,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:22:05,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,295 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:22:05,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:22:05,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:22:05,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:22:05,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (1/1) ... [2022-11-16 20:22:05,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:05,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:22:05,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:22:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:22:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:22:05,403 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:22:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:22:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:22:05,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:22:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:22:05,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:22:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:22:05,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:22:05,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:22:05,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:22:05,727 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:22:05,772 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:22:05,772 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 20:22:05,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:05 BoogieIcfgContainer [2022-11-16 20:22:05,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:22:05,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:22:05,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:22:05,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:22:05,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:22:04" (1/3) ... [2022-11-16 20:22:05,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe3f55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:05, skipping insertion in model container [2022-11-16 20:22:05,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:05" (2/3) ... [2022-11-16 20:22:05,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe3f55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:05, skipping insertion in model container [2022-11-16 20:22:05,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:05" (3/3) ... [2022-11-16 20:22:05,790 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2022-11-16 20:22:05,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:22:05,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:22:05,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:22:05,932 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;@46ecc174, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:22:05,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:22:05,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:22:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:22:05,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:05,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:05,952 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash -345104842, now seen corresponding path program 1 times [2022-11-16 20:22:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:05,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943810136] [2022-11-16 20:22:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:06,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:06,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551815947] [2022-11-16 20:22:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:06,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:06,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:06,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:22:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 20:22:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:06,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:22:06,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943810136] [2022-11-16 20:22:06,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551815947] [2022-11-16 20:22:06,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551815947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:06,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:06,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:22:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458378607] [2022-11-16 20:22:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:22:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:22:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:22:06,500 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:06,589 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-16 20:22:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:22:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-16 20:22:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:06,603 INFO L225 Difference]: With dead ends: 28 [2022-11-16 20:22:06,603 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 20:22:06,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:22:06,617 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:06,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:22:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 20:22:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-16 20:22:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:22:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-16 20:22:06,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2022-11-16 20:22:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:06,676 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-16 20:22:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-16 20:22:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 20:22:06,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:06,681 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:06,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:06,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:06,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1899476879, now seen corresponding path program 1 times [2022-11-16 20:22:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013489785] [2022-11-16 20:22:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:06,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:06,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457412620] [2022-11-16 20:22:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:06,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:06,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:22:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:22:07,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:22:07,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:22:07,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:07,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013489785] [2022-11-16 20:22:07,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:07,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457412620] [2022-11-16 20:22:07,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457412620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:07,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:07,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:22:07,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573084461] [2022-11-16 20:22:07,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:22:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:22:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:22:07,221 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:22:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:07,345 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-11-16 20:22:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:22:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-16 20:22:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:07,347 INFO L225 Difference]: With dead ends: 37 [2022-11-16 20:22:07,347 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:22:07,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:22:07,349 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:07,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:22:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:22:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-16 20:22:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:22:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-16 20:22:07,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2022-11-16 20:22:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:07,359 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-16 20:22:07,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:22:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-16 20:22:07,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 20:22:07,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:07,361 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:07,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:07,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:07,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:07,569 INFO L85 PathProgramCache]: Analyzing trace with hash 980269376, now seen corresponding path program 1 times [2022-11-16 20:22:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190172819] [2022-11-16 20:22:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:07,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:07,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474497862] [2022-11-16 20:22:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:07,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:07,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:07,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:22:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:07,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:22:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:22:07,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:22:07,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190172819] [2022-11-16 20:22:07,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474497862] [2022-11-16 20:22:07,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474497862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:07,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:07,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:22:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851431033] [2022-11-16 20:22:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:22:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:22:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:22:07,731 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:22:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:07,809 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-11-16 20:22:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:22:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-16 20:22:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:07,811 INFO L225 Difference]: With dead ends: 40 [2022-11-16 20:22:07,811 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 20:22:07,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:22:07,813 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:07,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:22:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 20:22:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-16 20:22:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:22:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-16 20:22:07,823 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2022-11-16 20:22:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-16 20:22:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 20:22:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-16 20:22:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 20:22:07,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:07,825 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:07,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:08,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:08,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1640466973, now seen corresponding path program 1 times [2022-11-16 20:22:08,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:08,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846490474] [2022-11-16 20:22:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:08,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:08,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:08,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929670264] [2022-11-16 20:22:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:08,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:08,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:08,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:08,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:22:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 20:22:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:08,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 86 [2022-11-16 20:22:08,764 INFO L321 Elim1Store]: treesize reduction 166, result has 0.6 percent of original size [2022-11-16 20:22:08,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 178 [2022-11-16 20:22:08,794 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:22:09,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 271 [2022-11-16 20:22:09,744 INFO L321 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-11-16 20:22:09,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 477 treesize of output 463 [2022-11-16 20:22:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:22:09,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:10,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2022-11-16 20:22:16,418 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 61 DAG size of output: 55 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 20:22:16,421 INFO L321 Elim1Store]: treesize reduction 88, result has 59.1 percent of original size [2022-11-16 20:22:16,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 269 [2022-11-16 20:22:25,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:22:25,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111945 treesize of output 111586 [2022-11-16 20:24:44,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:44,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846490474] [2022-11-16 20:24:44,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:24:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929670264] [2022-11-16 20:24:44,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929670264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [185999342] [2022-11-16 20:24:44,408 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:24:44,408 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:24:44,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:24:44,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:24:44,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:24:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:44,562 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:24:44,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:24:44,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:44,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-16 20:24:44,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:44,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2022-11-16 20:24:44,724 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 34 treesize of output 30 [2022-11-16 20:24:44,780 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 34 treesize of output 30 [2022-11-16 20:24:45,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:45,320 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:24:45,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:24:45,805 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:24:45,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:24:50,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '575#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:24:50,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:24:50,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:50,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-16 20:24:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536379578] [2022-11-16 20:24:50,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:24:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:24:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:24:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 20:24:50,507 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:24:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:52,443 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-11-16 20:24:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 20:24:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2022-11-16 20:24:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:52,447 INFO L225 Difference]: With dead ends: 59 [2022-11-16 20:24:52,447 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 20:24:52,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=396, Invalid=2574, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 20:24:52,450 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:52,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 93 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 205 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-11-16 20:24:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 20:24:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2022-11-16 20:24:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:24:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-11-16 20:24:52,471 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 25 [2022-11-16 20:24:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:52,471 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-11-16 20:24:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:24:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-11-16 20:24:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 20:24:52,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:52,473 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:52,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:52,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash 676074943, now seen corresponding path program 2 times [2022-11-16 20:24:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:52,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170398893] [2022-11-16 20:24:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:52,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:52,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:24:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724624085] [2022-11-16 20:24:52,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:24:52,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:52,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:52,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:24:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:24:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:24:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:24:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:24:52,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:24:52,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170398893] [2022-11-16 20:24:52,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:24:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724624085] [2022-11-16 20:24:52,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724624085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487804258] [2022-11-16 20:24:52,983 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:24:52,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:24:52,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:24:52,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:24:52,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:24:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:53,071 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:24:53,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:24:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:53,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-16 20:24:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:53,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2022-11-16 20:24:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:53,406 INFO L321 Elim1Store]: treesize reduction 103, result has 6.4 percent of original size [2022-11-16 20:24:53,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 349 [2022-11-16 20:24:53,534 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 34 treesize of output 30 [2022-11-16 20:24:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:54,048 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:24:54,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:24:54,477 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:24:54,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:24:57,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '939#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:24:57,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:24:57,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:24:57,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-16 20:24:57,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175382438] [2022-11-16 20:24:57,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:24:57,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:24:57,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:24:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:24:57,775 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:24:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:57,957 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-11-16 20:24:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:24:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-16 20:24:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:57,959 INFO L225 Difference]: With dead ends: 68 [2022-11-16 20:24:57,959 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 20:24:57,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-16 20:24:57,960 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:57,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 20:24:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2022-11-16 20:24:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:24:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-16 20:24:57,977 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 26 [2022-11-16 20:24:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:57,977 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-16 20:24:57,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:24:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-16 20:24:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:24:57,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:57,979 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:57,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 20:24:58,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:58,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -182315624, now seen corresponding path program 3 times [2022-11-16 20:24:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640733193] [2022-11-16 20:24:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:58,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:24:58,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112553380] [2022-11-16 20:24:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:24:58,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:58,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:58,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:24:58,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:24:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:24:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:24:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:24:58,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:24:58,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640733193] [2022-11-16 20:24:58,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:24:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112553380] [2022-11-16 20:24:58,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112553380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:58,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544658632] [2022-11-16 20:24:58,395 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:24:58,396 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:24:58,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:24:58,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:24:58,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:24:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:58,538 INFO L321 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2022-11-16 20:24:58,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2022-11-16 20:24:58,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:58,655 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:24:58,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:24:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:58,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2022-11-16 20:24:58,786 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 34 treesize of output 30 [2022-11-16 20:24:58,823 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 34 treesize of output 30 [2022-11-16 20:24:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:24:59,426 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:24:59,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:24:59,826 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:24:59,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:25:03,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1331#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:25:03,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:25:03,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:25:03,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:25:03,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115167497] [2022-11-16 20:25:03,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:03,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:25:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:25:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:25:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:25:03,909 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:04,129 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-11-16 20:25:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:25:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-16 20:25:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:04,130 INFO L225 Difference]: With dead ends: 76 [2022-11-16 20:25:04,131 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 20:25:04,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-11-16 20:25:04,132 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:04,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 50 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:25:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 20:25:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-11-16 20:25:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:25:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-16 20:25:04,152 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 28 [2022-11-16 20:25:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:04,152 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-16 20:25:04,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-16 20:25:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 20:25:04,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:04,154 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:04,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:04,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:04,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2009154776, now seen corresponding path program 4 times [2022-11-16 20:25:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952297532] [2022-11-16 20:25:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:04,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:25:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082772751] [2022-11-16 20:25:04,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:25:04,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:04,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:04,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:04,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:25:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:25:04,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:25:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 20:25:04,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:25:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952297532] [2022-11-16 20:25:04,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:25:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082772751] [2022-11-16 20:25:04,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082772751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:04,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268830492] [2022-11-16 20:25:04,650 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:25:04,651 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:25:04,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:25:04,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:25:04,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:25:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:04,771 INFO L321 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2022-11-16 20:25:04,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 68 [2022-11-16 20:25:04,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:04,898 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:25:04,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:25:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:04,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2022-11-16 20:25:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:05,284 INFO L321 Elim1Store]: treesize reduction 109, result has 26.8 percent of original size [2022-11-16 20:25:05,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 351 treesize of output 354 [2022-11-16 20:25:05,455 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 34 treesize of output 30 [2022-11-16 20:25:05,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:05,905 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:25:05,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:25:06,225 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:25:06,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:25:08,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1744#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:25:08,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:25:08,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:25:08,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:25:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925090697] [2022-11-16 20:25:08,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:08,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:25:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:25:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:25:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:25:08,963 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:09,240 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2022-11-16 20:25:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:25:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2022-11-16 20:25:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:09,243 INFO L225 Difference]: With dead ends: 92 [2022-11-16 20:25:09,243 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 20:25:09,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-16 20:25:09,244 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:09,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:25:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 20:25:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2022-11-16 20:25:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 44 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:25:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-16 20:25:09,269 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 30 [2022-11-16 20:25:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:09,270 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-16 20:25:09,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-16 20:25:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 20:25:09,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:09,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:09,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:09,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:09,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:09,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash -395185713, now seen corresponding path program 5 times [2022-11-16 20:25:09,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639635197] [2022-11-16 20:25:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:09,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:09,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:25:09,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393766706] [2022-11-16 20:25:09,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:25:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:09,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:09,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:25:09,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:25:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:25:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:25:09,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:25:09,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:25:09,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:25:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639635197] [2022-11-16 20:25:09,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:25:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393766706] [2022-11-16 20:25:09,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393766706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180008632] [2022-11-16 20:25:09,714 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:25:09,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:25:09,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:25:09,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:25:09,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:25:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:09,797 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:25:09,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:25:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:09,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-16 20:25:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:09,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2022-11-16 20:25:09,919 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 34 treesize of output 30 [2022-11-16 20:25:09,955 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 34 treesize of output 30 [2022-11-16 20:25:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:10,511 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:25:10,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:25:10,907 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:25:10,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:25:13,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2202#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:25:13,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:25:13,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:25:13,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-16 20:25:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967332629] [2022-11-16 20:25:13,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:25:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:25:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:25:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-16 20:25:13,752 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:25:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:13,906 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2022-11-16 20:25:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:25:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-16 20:25:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:13,907 INFO L225 Difference]: With dead ends: 79 [2022-11-16 20:25:13,907 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 20:25:13,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:25:13,909 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:13,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:25:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 20:25:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-11-16 20:25:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:25:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-16 20:25:13,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2022-11-16 20:25:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:13,923 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-16 20:25:13,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 20:25:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-16 20:25:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 20:25:13,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:13,924 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:13,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:14,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:14,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:14,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2145882608, now seen corresponding path program 6 times [2022-11-16 20:25:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322003859] [2022-11-16 20:25:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:14,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:25:14,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619108360] [2022-11-16 20:25:14,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:25:14,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:14,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:14,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:14,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:25:14,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:25:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:25:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:25:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:25:14,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:25:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:25:14,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:25:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322003859] [2022-11-16 20:25:14,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:25:14,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619108360] [2022-11-16 20:25:14,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619108360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:25:14,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277741879] [2022-11-16 20:25:14,432 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-16 20:25:14,432 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:25:14,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:25:14,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:25:14,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:25:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:14,519 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:25:14,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-16 20:25:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:14,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-11-16 20:25:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:14,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2022-11-16 20:25:14,653 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 34 treesize of output 30 [2022-11-16 20:25:14,688 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 34 treesize of output 30 [2022-11-16 20:25:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:15,283 INFO L321 Elim1Store]: treesize reduction 79, result has 49.7 percent of original size [2022-11-16 20:25:15,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 110 [2022-11-16 20:25:15,682 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:25:15,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:25:18,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2627#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= (ite (and (<= 0 |ULTIMATE.start_main_~sum~0#1|) (<= |ULTIMATE.start_main_~sum~0#1| ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:25:18,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:25:18,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:25:18,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:25:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394072292] [2022-11-16 20:25:18,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:25:18,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:25:18,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:25:18,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:25:18,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-11-16 20:25:18,556 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:18,908 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-11-16 20:25:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:25:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-11-16 20:25:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:18,910 INFO L225 Difference]: With dead ends: 59 [2022-11-16 20:25:18,910 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 20:25:18,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-11-16 20:25:18,911 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:25:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 20:25:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-16 20:25:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 20:25:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-16 20:25:18,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 34 [2022-11-16 20:25:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:18,926 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-16 20:25:18,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:25:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-16 20:25:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 20:25:18,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:18,927 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:18,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:25:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 20:25:19,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash -944111439, now seen corresponding path program 7 times [2022-11-16 20:25:19,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:19,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673866986] [2022-11-16 20:25:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:19,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:19,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:25:19,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805201238] [2022-11-16 20:25:19,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:25:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:19,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:19,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:19,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61df231-bf64-4db7-bcd2-32f1c4cb2023/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:25:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:19,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 20:25:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:19,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2022-11-16 20:25:19,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 20:25:19,766 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:25:19,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 65 [2022-11-16 20:25:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:19,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:19,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 135 [2022-11-16 20:25:19,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:19,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 81 treesize of output 20 [2022-11-16 20:25:20,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 70 [2022-11-16 20:25:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 156 [2022-11-16 20:25:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 22 [2022-11-16 20:25:20,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2022-11-16 20:25:20,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:20,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 145 [2022-11-16 20:25:20,359 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:25:21,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 161 [2022-11-16 20:25:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:22,775 INFO L321 Elim1Store]: treesize reduction 684, result has 17.0 percent of original size [2022-11-16 20:25:22,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 120 treesize of output 352 [2022-11-16 20:26:02,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1925 treesize of output 1855 [2022-11-16 20:26:02,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:26:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:26:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:26:02,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:26:02,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:26:15,043 WARN L233 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 232 DAG size of output: 121 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 20:26:15,045 INFO L321 Elim1Store]: treesize reduction 733, result has 39.1 percent of original size [2022-11-16 20:26:15,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 10 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 69 case distinctions, treesize of input 116812 treesize of output 115016 [2022-11-16 20:35:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:35:28,987 INFO L328 TraceCheckSpWp]: Computing backward predicates...