./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7 --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 f1b6ac589e17a1425c18d8694ea032f5464d66d6d18c040a40e1edc53bc0f3c5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:11:58,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:11:58,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:11:58,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:11:58,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:11:58,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:11:58,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:11:58,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:11:58,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:11:58,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:11:58,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:11:58,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:11:58,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:11:58,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:11:58,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:11:58,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:11:58,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:11:58,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:11:58,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:11:58,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:11:59,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:11:59,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:11:59,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:11:59,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:11:59,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:11:59,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:11:59,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:11:59,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:11:59,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:11:59,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:11:59,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:11:59,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:11:59,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:11:59,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:11:59,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:11:59,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:11:59,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:11:59,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:11:59,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:11:59,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:11:59,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:11:59,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:11:59,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:11:59,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:11:59,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:11:59,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:11:59,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:11:59,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:11:59,054 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:11:59,054 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:11:59,055 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:11:59,055 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:11:59,055 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:11:59,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:11:59,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:11:59,056 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:11:59,057 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:11:59,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:11:59,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:11:59,058 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:11:59,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:11:59,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:11:59,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:11:59,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:11:59,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:11:59,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:11:59,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:11:59,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:11:59,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:11:59,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:11:59,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:11:59,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:11:59,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:11:59,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:11:59,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:59,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:11:59,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:11:59,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:11:59,065 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:11:59,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:11:59,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:11:59,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:11:59,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:11:59,067 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b6ac589e17a1425c18d8694ea032f5464d66d6d18c040a40e1edc53bc0f3c5 [2021-11-25 20:11:59,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:11:59,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:11:59,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:11:59,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:11:59,313 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:11:59,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-crafted/bor3.i [2021-11-25 20:11:59,396 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/data/26439afda/fa916a78e3604158804c2e120c1abffa/FLAGf5101160f [2021-11-25 20:11:59,801 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:11:59,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/sv-benchmarks/c/array-crafted/bor3.i [2021-11-25 20:11:59,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/data/26439afda/fa916a78e3604158804c2e120c1abffa/FLAGf5101160f [2021-11-25 20:12:00,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/data/26439afda/fa916a78e3604158804c2e120c1abffa [2021-11-25 20:12:00,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:12:00,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:12:00,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:12:00,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:12:00,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:12:00,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550d07db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00, skipping insertion in model container [2021-11-25 20:12:00,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:12:00,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:12:00,404 WARN L230 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_df48b547-4589-4238-9468-c9b8565f8f35/sv-benchmarks/c/array-crafted/bor3.i[1297,1310] [2021-11-25 20:12:00,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:12:00,414 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:12:00,432 WARN L230 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_df48b547-4589-4238-9468-c9b8565f8f35/sv-benchmarks/c/array-crafted/bor3.i[1297,1310] [2021-11-25 20:12:00,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:12:00,445 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:12:00,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00 WrapperNode [2021-11-25 20:12:00,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:12:00,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:12:00,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:12:00,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:12:00,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,481 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2021-11-25 20:12:00,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:12:00,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:12:00,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:12:00,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:12:00,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:12:00,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:12:00,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:12:00,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:12:00,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (1/1) ... [2021-11-25 20:12:00,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:12:00,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:00,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:12:00,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:12:00,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:12:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2021-11-25 20:12:00,589 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2021-11-25 20:12:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:12:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:12:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:12:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:12:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:12:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:12:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:12:00,652 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:12:00,653 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:12:00,784 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:12:00,812 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:12:00,812 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:12:00,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:12:00 BoogieIcfgContainer [2021-11-25 20:12:00,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:12:00,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:12:00,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:12:00,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:12:00,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:12:00" (1/3) ... [2021-11-25 20:12:00,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b13bbf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:12:00, skipping insertion in model container [2021-11-25 20:12:00,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:12:00" (2/3) ... [2021-11-25 20:12:00,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b13bbf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:12:00, skipping insertion in model container [2021-11-25 20:12:00,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:12:00" (3/3) ... [2021-11-25 20:12:00,840 INFO L111 eAbstractionObserver]: Analyzing ICFG bor3.i [2021-11-25 20:12:00,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:12:00,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:12:00,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:12:00,918 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:12:00,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:12:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-25 20:12:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:12:00,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:00,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:00,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1439153059, now seen corresponding path program 1 times [2021-11-25 20:12:00,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:00,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121972892] [2021-11-25 20:12:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:00,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:12:01,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121972892] [2021-11-25 20:12:01,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121972892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:01,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:12:01,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:12:01,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015797919] [2021-11-25 20:12:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:01,200 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-25 20:12:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:01,265 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-25 20:12:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:12:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 20 [2021-11-25 20:12:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:01,274 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:12:01,277 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:12:01,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:01,284 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:01,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:12:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 20:12:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-25 20:12:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 20:12:01,331 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-25 20:12:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:01,332 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 20:12:01,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-25 20:12:01,332 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 20:12:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:12:01,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:01,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:01,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:12:01,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash -538547963, now seen corresponding path program 1 times [2021-11-25 20:12:01,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:01,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898853201] [2021-11-25 20:12:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:01,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:12:01,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898853201] [2021-11-25 20:12:01,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898853201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946711179] [2021-11-25 20:12:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:01,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:01,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:01,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:12:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:12:01,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:12:01,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:12:01,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946711179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:01,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:12:01,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:12:01,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723302287] [2021-11-25 20:12:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:01,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:01,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:12:01,608 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:12:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:01,626 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-25 20:12:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:12:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-25 20:12:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:01,627 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:12:01,628 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:12:01,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:12:01,630 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:01,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:12:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 20:12:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-25 20:12:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 20:12:01,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-25 20:12:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:01,637 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 20:12:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 20:12:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 20:12:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:12:01,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:01,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:01,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:01,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:01,864 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash -807854650, now seen corresponding path program 1 times [2021-11-25 20:12:01,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:01,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696620505] [2021-11-25 20:12:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:01,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:12:01,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:01,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696620505] [2021-11-25 20:12:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696620505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:01,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972295312] [2021-11-25 20:12:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:01,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:01,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:01,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:12:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:12:02,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:12:02,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:12:02,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972295312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:02,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:12:02,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:12:02,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128827474] [2021-11-25 20:12:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:02,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:02,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:12:02,119 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-11-25 20:12:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:02,135 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-25 20:12:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:12:02,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 24 [2021-11-25 20:12:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:02,137 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:12:02,137 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:12:02,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:12:02,139 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:02,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:12:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 20:12:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-11-25 20:12:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 20:12:02,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-25 20:12:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 20:12:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2021-11-25 20:12:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 20:12:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:12:02,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:02,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:02,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:02,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:02,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 34772627, now seen corresponding path program 1 times [2021-11-25 20:12:02,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783852894] [2021-11-25 20:12:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:02,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:12:02,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783852894] [2021-11-25 20:12:02,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783852894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:02,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110402954] [2021-11-25 20:12:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:02,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:02,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:02,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:02,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:12:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:02,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:12:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:12:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 20:12:02,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110402954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:02,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7868594] [2021-11-25 20:12:02,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:02,726 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:02,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:02,736 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:02,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:02,850 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:02,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:02,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:12:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:02,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:12:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:03,154 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:12:03,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:12:03,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:03,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-25 20:12:03,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,713 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 20:12:03,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 20:12:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:03,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:03,990 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:04,042 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:04,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_6 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_6 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_6 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_6 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:04,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:04,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:04,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-25 20:12:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300583803] [2021-11-25 20:12:04,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:04,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:12:04,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:12:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:12:04,909 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:04,935 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-25 20:12:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:12:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-25 20:12:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:04,937 INFO L225 Difference]: With dead ends: 36 [2021-11-25 20:12:04,937 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:12:04,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:12:04,939 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:04,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:12:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 20:12:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-11-25 20:12:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-25 20:12:04,945 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-25 20:12:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:04,945 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-25 20:12:04,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-25 20:12:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:12:04,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:04,947 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:04,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:05,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:05,176 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 160034795, now seen corresponding path program 2 times [2021-11-25 20:12:05,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488985470] [2021-11-25 20:12:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:05,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:12:05,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488985470] [2021-11-25 20:12:05,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488985470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:05,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27947464] [2021-11-25 20:12:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:12:05,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:05,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:05,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:12:05,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:12:05,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:12:05,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:12:05,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:12:05,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27947464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:05,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336641245] [2021-11-25 20:12:05,470 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:05,471 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:05,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:05,472 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:05,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,507 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:12:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:12:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,534 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:12:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,685 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:12:05,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:12:05,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:12:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:05,983 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:12:05,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:12:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:06,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:06,182 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:06,233 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:11,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:11,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:11,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:11,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 20:12:11,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842522325] [2021-11-25 20:12:11,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:11,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:12:11,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:12:11,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:12:11,207 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:11,241 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-25 20:12:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:12:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2021-11-25 20:12:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:11,243 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:12:11,243 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:12:11,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:12:11,245 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:11,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:12:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 20:12:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2021-11-25 20:12:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 20:12:11,250 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-25 20:12:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:11,250 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 20:12:11,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 20:12:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 20:12:11,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:11,252 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:11,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:11,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:11,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1885684020, now seen corresponding path program 3 times [2021-11-25 20:12:11,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:11,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312490686] [2021-11-25 20:12:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:11,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 20:12:11,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312490686] [2021-11-25 20:12:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312490686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:11,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958389219] [2021-11-25 20:12:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:12:11,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:11,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:11,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:12:11,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:12:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:12:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 20:12:11,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-25 20:12:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958389219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918279025] [2021-11-25 20:12:11,866 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:11,866 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:11,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:11,867 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:11,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:11,903 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:12:11,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:12:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:11,934 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:11,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:11,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:11,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:12:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:12,084 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:12:12,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:12:12,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:12,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:12,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:12:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,456 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:12:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:12:12,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:12,626 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:12,660 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:15,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:15,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:15,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:15,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2021-11-25 20:12:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750597959] [2021-11-25 20:12:15,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:12:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:12:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:12:15,522 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:12:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:15,572 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-25 20:12:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:12:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2021-11-25 20:12:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:15,573 INFO L225 Difference]: With dead ends: 49 [2021-11-25 20:12:15,574 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:12:15,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:12:15,576 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:15,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:12:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:12:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-11-25 20:12:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-25 20:12:15,582 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2021-11-25 20:12:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:15,582 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-25 20:12:15,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 20:12:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-25 20:12:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:12:15,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:15,584 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:15,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:15,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:15,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 210425085, now seen corresponding path program 4 times [2021-11-25 20:12:15,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:15,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684690336] [2021-11-25 20:12:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:15,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 20:12:15,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684690336] [2021-11-25 20:12:15,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684690336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:15,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665330130] [2021-11-25 20:12:15,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:12:15,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:15,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:12:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:12:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 20:12:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 20:12:16,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665330130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:16,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361825225] [2021-11-25 20:12:16,431 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:16,431 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:16,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:16,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:16,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:16,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,463 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:16,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:12:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:12:16,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,613 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:12:16,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:12:16,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:12:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,885 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:12:16,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:12:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:16,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:17,067 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:17,102 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:17,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (- 4294967296))))) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:17,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:17,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2021-11-25 20:12:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054893767] [2021-11-25 20:12:17,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:17,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:12:17,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:12:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:12:17,894 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:17,952 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-25 20:12:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:12:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-11-25 20:12:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:17,953 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:12:17,954 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:12:17,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:12:17,956 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:17,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:12:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:12:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 20:12:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2021-11-25 20:12:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-25 20:12:17,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2021-11-25 20:12:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:17,963 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-25 20:12:17,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-25 20:12:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:12:17,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:17,966 INFO L514 BasicCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:17,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:18,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:18,176 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1481216765, now seen corresponding path program 5 times [2021-11-25 20:12:18,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:18,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034514074] [2021-11-25 20:12:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:18,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 20:12:18,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:18,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034514074] [2021-11-25 20:12:18,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034514074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:18,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419074697] [2021-11-25 20:12:18,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:12:18,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:18,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:18,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:12:18,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:12:18,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:12:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-25 20:12:18,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-25 20:12:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419074697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797483614] [2021-11-25 20:12:18,963 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:18,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:18,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:18,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:18,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:18,994 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:12:18,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:12:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,022 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:19,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:12:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,162 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:12:19,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:12:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-25 20:12:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,429 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 20:12:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-25 20:12:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:19,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:19,625 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:19,656 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:22,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.offset| 0) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:22,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:22,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:22,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-11-25 20:12:22,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097861501] [2021-11-25 20:12:22,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:22,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 20:12:22,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:22,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 20:12:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:12:22,626 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:22,713 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-25 20:12:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:12:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2021-11-25 20:12:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:22,718 INFO L225 Difference]: With dead ends: 69 [2021-11-25 20:12:22,718 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 20:12:22,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:12:22,721 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:22,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:12:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 20:12:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-25 20:12:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 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) [2021-11-25 20:12:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-25 20:12:22,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2021-11-25 20:12:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-25 20:12:22,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-25 20:12:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:12:22,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:22,732 INFO L514 BasicCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:22,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:22,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:22,948 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:22,948 INFO L85 PathProgramCache]: Analyzing trace with hash -10477499, now seen corresponding path program 6 times [2021-11-25 20:12:22,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:22,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669409538] [2021-11-25 20:12:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:22,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:23,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669409538] [2021-11-25 20:12:23,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669409538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416207120] [2021-11-25 20:12:23,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:12:23,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:23,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:23,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:12:23,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:12:23,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:12:23,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:23,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:24,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416207120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024396319] [2021-11-25 20:12:24,451 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:24,451 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:24,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:24,451 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:24,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,488 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:12:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:12:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,631 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:12:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:12:24,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-25 20:12:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,893 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 20:12:24,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-25 20:12:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:24,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:25,060 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:25,091 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:28,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_35 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_35 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_35 4294967296) (- 4294967296))))) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:28,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:28,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:28,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2021-11-25 20:12:28,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265487875] [2021-11-25 20:12:28,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:28,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:12:28,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:12:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 20:12:28,068 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:28,175 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2021-11-25 20:12:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 20:12:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2021-11-25 20:12:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:28,179 INFO L225 Difference]: With dead ends: 100 [2021-11-25 20:12:28,180 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 20:12:28,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 20:12:28,184 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:28,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:12:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 20:12:28,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-25 20:12:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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) [2021-11-25 20:12:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-25 20:12:28,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2021-11-25 20:12:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-25 20:12:28,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-25 20:12:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:12:28,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:28,214 INFO L514 BasicCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:28,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:28,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:12:28,438 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1436572317, now seen corresponding path program 7 times [2021-11-25 20:12:28,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:28,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287015464] [2021-11-25 20:12:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:28,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:29,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:29,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287015464] [2021-11-25 20:12:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287015464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:29,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431933819] [2021-11-25 20:12:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:12:29,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:29,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:29,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:29,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:12:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 20:12:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:29,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:32,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431933819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:32,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521800567] [2021-11-25 20:12:32,576 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:32,577 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:32,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:32,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:32,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,609 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:12:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:12:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:32,752 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:12:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:12:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:32,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:12:33,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:33,035 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:12:33,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:12:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:33,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:33,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:33,182 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:33,215 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:40,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:12:40,430 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:40,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:40,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2021-11-25 20:12:40,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132677351] [2021-11-25 20:12:40,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:40,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-25 20:12:40,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:40,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-25 20:12:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5109, Invalid=7772, Unknown=1, NotChecked=0, Total=12882 [2021-11-25 20:12:40,438 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:40,648 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2021-11-25 20:12:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-25 20:12:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-11-25 20:12:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:40,650 INFO L225 Difference]: With dead ends: 150 [2021-11-25 20:12:40,650 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 20:12:40,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=5109, Invalid=7772, Unknown=1, NotChecked=0, Total=12882 [2021-11-25 20:12:40,656 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:40,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:12:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 20:12:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-25 20:12:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 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) [2021-11-25 20:12:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-25 20:12:40,666 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2021-11-25 20:12:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:40,667 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-25 20:12:40,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:12:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-25 20:12:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 20:12:40,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:40,670 INFO L514 BasicCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:40,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:12:40,885 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1773791133, now seen corresponding path program 8 times [2021-11-25 20:12:40,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:40,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381028757] [2021-11-25 20:12:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:40,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-25 20:12:45,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381028757] [2021-11-25 20:12:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381028757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323167651] [2021-11-25 20:12:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:12:45,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:45,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:45,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:12:45,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:12:45,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:12:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2021-11-25 20:12:45,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2021-11-25 20:12:45,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323167651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:45,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567166227] [2021-11-25 20:12:45,864 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:12:45,864 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:45,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:45,864 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:45,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:45,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:45,897 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:12:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:12:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:45,923 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:12:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:12:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:45,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:12:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,074 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:12:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:12:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:12:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:12:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:12:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:12:46,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,307 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:12:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:12:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:12:46,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:12:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:12:46,463 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:12:46,494 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:54,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_48 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_48 4294967296) (- 4294967296))))) (<= |#NULL.offset| 0) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:12:54,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:12:54,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:12:54,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2021-11-25 20:12:54,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175408091] [2021-11-25 20:12:54,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:12:54,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-25 20:12:54,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-25 20:12:54,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 20:12:54,200 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:54,367 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-11-25 20:12:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-25 20:12:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2021-11-25 20:12:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:54,372 INFO L225 Difference]: With dead ends: 155 [2021-11-25 20:12:54,372 INFO L226 Difference]: Without dead ends: 130 [2021-11-25 20:12:54,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 20:12:54,377 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:54,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:12:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-25 20:12:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-25 20:12:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 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) [2021-11-25 20:12:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-11-25 20:12:54,395 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2021-11-25 20:12:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:54,395 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-11-25 20:12:54,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:12:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-11-25 20:12:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-25 20:12:54,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:54,400 INFO L514 BasicCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:54,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:54,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:54,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1239752187, now seen corresponding path program 9 times [2021-11-25 20:12:54,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704549401] [2021-11-25 20:12:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:54,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:12:58,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:58,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704549401] [2021-11-25 20:12:58,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704549401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:58,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544974839] [2021-11-25 20:12:58,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:12:58,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:58,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:58,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:58,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:12:58,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:12:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:12:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-25 20:12:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:12:59,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:13:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544974839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1279433478] [2021-11-25 20:13:09,886 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:09,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:09,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:09,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:09,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:09,912 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:13:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-25 20:13:09,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:09,933 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:09,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:13:09,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2021-11-25 20:13:10,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,065 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:13:10,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 298 treesize of output 279 [2021-11-25 20:13:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:13:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:13:10,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:13:10,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,299 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:13:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:13:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:13:10,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:13:10,438 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:10,492 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:14,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_53 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_53 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_53 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_53 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:14,187 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:14,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:14,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2021-11-25 20:13:14,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128340539] [2021-11-25 20:13:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:14,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-25 20:13:14,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-25 20:13:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-25 20:13:14,200 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:13:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:14,641 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2021-11-25 20:13:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-25 20:13:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2021-11-25 20:13:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:14,643 INFO L225 Difference]: With dead ends: 260 [2021-11-25 20:13:14,643 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 20:13:14,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-25 20:13:14,648 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:14,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:13:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 20:13:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-25 20:13:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 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) [2021-11-25 20:13:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2021-11-25 20:13:14,660 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2021-11-25 20:13:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2021-11-25 20:13:14,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:13:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2021-11-25 20:13:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-25 20:13:14,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:14,665 INFO L514 BasicCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:14,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:14,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:14,880 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2122053027, now seen corresponding path program 10 times [2021-11-25 20:13:14,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605796321] [2021-11-25 20:13:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:14,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:13:29,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605796321] [2021-11-25 20:13:29,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605796321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:29,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277721470] [2021-11-25 20:13:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:29,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:29,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:29,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:29,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:13:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:30,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-25 20:13:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:13:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:14:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277721470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385638577] [2021-11-25 20:14:13,488 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:14:13,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:13,489 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:13,489 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:13,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,519 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:14:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:14:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:14:13,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:14:13,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:13,651 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:14:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:14:13,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:14:13,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:14:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:13,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:14:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:13,976 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:14:13,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:14:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:14,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:14:14,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:14:14,121 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:14:14,163 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:18,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_60 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296) (+ (- 4294967296) (mod v_bor_~res~0_BEFORE_RETURN_60 4294967296))))) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:18,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:18,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:18,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2021-11-25 20:14:18,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41434416] [2021-11-25 20:14:18,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:18,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-25 20:14:18,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-25 20:14:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2021-11-25 20:14:18,806 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:14:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:20,584 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2021-11-25 20:14:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-25 20:14:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2021-11-25 20:14:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:20,588 INFO L225 Difference]: With dead ends: 462 [2021-11-25 20:14:20,588 INFO L226 Difference]: Without dead ends: 433 [2021-11-25 20:14:20,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2021-11-25 20:14:20,597 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:20,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:14:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-25 20:14:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2021-11-25 20:14:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 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) [2021-11-25 20:14:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2021-11-25 20:14:20,616 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2021-11-25 20:14:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:20,617 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2021-11-25 20:14:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:14:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2021-11-25 20:14:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-25 20:14:20,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:20,641 INFO L514 BasicCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:14:20,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:20,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:14:20,868 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1384698717, now seen corresponding path program 11 times [2021-11-25 20:14:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366038813] [2021-11-25 20:14:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:20,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-25 20:15:18,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366038813] [2021-11-25 20:15:18,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366038813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229495864] [2021-11-25 20:15:18,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:18,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:18,555 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:18,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:15:19,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:15:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:15:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2021-11-25 20:15:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2021-11-25 20:15:22,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229495864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853602971] [2021-11-25 20:15:22,295 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:15:22,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:22,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:22,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:22,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:22,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,329 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:15:22,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:15:22,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:15:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:15:22,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:22,468 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:15:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:15:22,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:15:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:15:22,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:22,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-25 20:15:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,750 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:15:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-25 20:15:22,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:22,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:15:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:15:22,920 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:15:22,966 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:33,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_66 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_66 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_66 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_66 4294967296) (- 4294967296))))) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:33,800 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:33,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:33,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2021-11-25 20:15:33,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016297133] [2021-11-25 20:15:33,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:33,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2021-11-25 20:15:33,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:33,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2021-11-25 20:15:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2021-11-25 20:15:33,821 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:15:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:36,184 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2021-11-25 20:15:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2021-11-25 20:15:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 458 [2021-11-25 20:15:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:36,189 INFO L225 Difference]: With dead ends: 471 [2021-11-25 20:15:36,189 INFO L226 Difference]: Without dead ends: 442 [2021-11-25 20:15:36,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2021-11-25 20:15:36,205 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:36,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:15:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-25 20:15:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-11-25 20:15:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 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) [2021-11-25 20:15:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2021-11-25 20:15:36,234 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2021-11-25 20:15:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:36,235 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2021-11-25 20:15:36,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:15:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2021-11-25 20:15:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-25 20:15:36,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:36,249 INFO L514 BasicCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:36,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:36,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:15:36,463 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1722644091, now seen corresponding path program 12 times [2021-11-25 20:15:36,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:36,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719585437] [2021-11-25 20:15:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-25 20:16:35,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:35,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719585437] [2021-11-25 20:16:35,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719585437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:35,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705302151] [2021-11-25 20:16:35,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:16:35,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:35,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:35,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:35,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:16:36,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:16:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 3953 conjuncts, 405 conjunts are in the unsatisfiable core [2021-11-25 20:16:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-25 20:16:37,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2021-11-25 20:19:32,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705302151] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265984393] [2021-11-25 20:19:32,344 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:19:32,344 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:19:32,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:19:32,345 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:19:32,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:19:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,373 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:19:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-25 20:19:32,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:19:32,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-25 20:19:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:19:32,520 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:19:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 288 treesize of output 280 [2021-11-25 20:19:32,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:19:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-25 20:19:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-11-25 20:19:32,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,771 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 20:19:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2021-11-25 20:19:32,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:19:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-25 20:19:32,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2021-11-25 20:19:32,950 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:19:32,978 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:19:39,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 10000 |ULTIMATE.start_main_~i~1#1|) (<= 9999 |ULTIMATE.start_main_~i~2#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 39996 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:19:39,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:19:39,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:19:39,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2021-11-25 20:19:39,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27434001] [2021-11-25 20:19:39,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:19:39,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2021-11-25 20:19:39,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2021-11-25 20:19:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-25 20:19:39,719 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:19:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:52,931 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2021-11-25 20:19:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-11-25 20:19:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 467 [2021-11-25 20:19:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:52,938 INFO L225 Difference]: With dead ends: 884 [2021-11-25 20:19:52,938 INFO L226 Difference]: Without dead ends: 847 [2021-11-25 20:19:52,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 237.3s TimeCoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-25 20:19:52,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:52,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:19:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-25 20:19:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2021-11-25 20:19:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.003562945368171) internal successors, (845), 842 states have internal predecessors, (845), 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) [2021-11-25 20:19:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2021-11-25 20:19:53,028 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2021-11-25 20:19:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:53,029 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2021-11-25 20:19:53,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 20:19:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2021-11-25 20:19:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-25 20:19:53,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:53,039 INFO L514 BasicCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:53,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:53,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df48b547-4589-4238-9468-c9b8565f8f35/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:53,244 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1210105379, now seen corresponding path program 13 times [2021-11-25 20:19:53,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:53,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750059527] [2021-11-25 20:19:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:53,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat