./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor4.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_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/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_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/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_cb61909a-83df-4acc-83d0-2593e5aabb75/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 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:13:33,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:13:33,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:13:33,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:13:33,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:13:33,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:13:33,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:13:33,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:13:33,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:13:33,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:13:33,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:13:33,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:13:33,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:13:33,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:13:33,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:13:33,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:13:33,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:13:33,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:13:33,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:13:33,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:13:33,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:13:33,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:13:33,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:13:33,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:13:33,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:13:33,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:13:33,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:13:33,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:13:33,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:13:33,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:13:33,654 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:13:33,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:13:33,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:13:33,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:13:33,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:13:33,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:13:33,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:13:33,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:13:33,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:13:33,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:13:33,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:13:33,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:13:33,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:13:33,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:13:33,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:13:33,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:13:33,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:13:33,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:13:33,716 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:13:33,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:13:33,716 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:13:33,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:13:33,718 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:13:33,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:13:33,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:13:33,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:13:33,718 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:13:33,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:13:33,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:13:33,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:13:33,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:13:33,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:13:33,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:13:33,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:13:33,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:13:33,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:13:33,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:13:33,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:13:33,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:13:33,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:13:33,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:13:33,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:13:33,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:13:33,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:13:33,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:13:33,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:13:33,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:13:33,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:13:33,726 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:13:33,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:13:33,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:13:33,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:13:33,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:13:33,727 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_cb61909a-83df-4acc-83d0-2593e5aabb75/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc [2021-11-25 20:13:33,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:13:34,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:13:34,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:13:34,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:13:34,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:13:34,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-crafted/bor4.i [2021-11-25 20:13:34,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/data/7df1ec306/54fa5b5c6f034c9b98841ab6795db663/FLAGfcd3499b6 [2021-11-25 20:13:34,586 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:13:34,587 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/sv-benchmarks/c/array-crafted/bor4.i [2021-11-25 20:13:34,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/data/7df1ec306/54fa5b5c6f034c9b98841ab6795db663/FLAGfcd3499b6 [2021-11-25 20:13:34,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/data/7df1ec306/54fa5b5c6f034c9b98841ab6795db663 [2021-11-25 20:13:34,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:13:34,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:13:34,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:34,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:13:34,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:13:34,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:34" (1/1) ... [2021-11-25 20:13:34,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bde5ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:34, skipping insertion in model container [2021-11-25 20:13:34,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:34" (1/1) ... [2021-11-25 20:13:34,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:13:34,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:13:35,180 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_cb61909a-83df-4acc-83d0-2593e5aabb75/sv-benchmarks/c/array-crafted/bor4.i[1303,1316] [2021-11-25 20:13:35,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:35,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:13:35,209 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_cb61909a-83df-4acc-83d0-2593e5aabb75/sv-benchmarks/c/array-crafted/bor4.i[1303,1316] [2021-11-25 20:13:35,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:35,222 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:13:35,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35 WrapperNode [2021-11-25 20:13:35,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:35,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:35,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:13:35,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:13:35,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,261 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2021-11-25 20:13:35,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:35,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:13:35,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:13:35,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:13:35,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:13:35,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:13:35,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:13:35,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:13:35,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (1/1) ... [2021-11-25 20:13:35,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:13:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:35,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:13:35,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:13:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:13:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2021-11-25 20:13:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2021-11-25 20:13:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:13:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:13:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:13:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:13:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:13:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:13:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:13:35,464 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:13:35,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:13:35,681 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:13:35,731 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:13:35,731 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:13:35,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:35 BoogieIcfgContainer [2021-11-25 20:13:35,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:13:35,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:13:35,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:13:35,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:13:35,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:13:34" (1/3) ... [2021-11-25 20:13:35,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4297b6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:35, skipping insertion in model container [2021-11-25 20:13:35,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:35" (2/3) ... [2021-11-25 20:13:35,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4297b6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:35, skipping insertion in model container [2021-11-25 20:13:35,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:35" (3/3) ... [2021-11-25 20:13:35,756 INFO L111 eAbstractionObserver]: Analyzing ICFG bor4.i [2021-11-25 20:13:35,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:13:35,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:13:35,823 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:13:35,830 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 20:13:35,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:13:35,847 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 20:13:35,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:13:35,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:35,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:35,853 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1439153059, now seen corresponding path program 1 times [2021-11-25 20:13:35,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120720166] [2021-11-25 20:13:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:35,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:36,065 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 20:13:36,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120720166] [2021-11-25 20:13:36,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120720166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:36,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:36,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:13:36,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439359603] [2021-11-25 20:13:36,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:36,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:36,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:36,118 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 20:13:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:36,158 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-25 20:13:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:36,161 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 20:13:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:36,168 INFO L225 Difference]: With dead ends: 33 [2021-11-25 20:13:36,168 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:13:36,171 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 20:13:36,174 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 20:13:36,176 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 20:13:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:13:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 20:13:36,209 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 20:13:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 20:13:36,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2021-11-25 20:13:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:36,212 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 20:13:36,212 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 20:13:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 20:13:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:13:36,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:36,214 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 20:13:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:13:36,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash -538547963, now seen corresponding path program 1 times [2021-11-25 20:13:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:36,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016814703] [2021-11-25 20:13:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:36,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:36,294 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 20:13:36,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016814703] [2021-11-25 20:13:36,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016814703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746707511] [2021-11-25 20:13:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:36,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:36,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:36,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:13:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:13:36,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:36,501 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 20:13:36,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:13:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746707511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:36,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:13:36,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:13:36,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772268138] [2021-11-25 20:13:36,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:36,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:36,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:36,520 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 20:13:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:36,541 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-11-25 20:13:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:36,541 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 20:13:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:36,542 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:13:36,542 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:13:36,543 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 20:13:36,545 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 20:13:36,545 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 20:13:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:13:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 20:13:36,550 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 20:13:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-25 20:13:36,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-25 20:13:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:36,552 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-25 20:13:36,552 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 20:13:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-25 20:13:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:13:36,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:36,553 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 20:13:36,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:36,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 20:13:36,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash -807854650, now seen corresponding path program 1 times [2021-11-25 20:13:36,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:36,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94357923] [2021-11-25 20:13:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:36,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:36,863 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 20:13:36,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94357923] [2021-11-25 20:13:36,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94357923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:36,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696502864] [2021-11-25 20:13:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:36,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:36,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:36,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:36,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:13:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:36,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:13:36,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:37,049 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 20:13:37,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:13:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696502864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:37,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:13:37,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:13:37,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005279070] [2021-11-25 20:13:37,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:37,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:37,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:37,055 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 20:13:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:37,078 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-25 20:13:37,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:37,079 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 20:13:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:37,081 INFO L225 Difference]: With dead ends: 27 [2021-11-25 20:13:37,081 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:13:37,082 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 20:13:37,086 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 20:13:37,088 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 20:13:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:13:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 20:13:37,097 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 20:13:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-25 20:13:37,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2021-11-25 20:13:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:37,103 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-25 20:13:37,104 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 20:13:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-25 20:13:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:13:37,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:37,106 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 20:13:37,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:37,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:37,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash 34772627, now seen corresponding path program 1 times [2021-11-25 20:13:37,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:37,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354572505] [2021-11-25 20:13:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:37,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:37,399 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 20:13:37,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:37,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354572505] [2021-11-25 20:13:37,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354572505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:37,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60226292] [2021-11-25 20:13:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:37,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:37,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:37,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:37,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:13:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:13:37,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:37,580 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 20:13:37,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:37,660 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 20:13:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60226292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8793400] [2021-11-25 20:13:37,681 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:37,681 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:37,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:37,691 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:37,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:37,787 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:13:37,788 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 20:13:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:37,820 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:37,820 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 20:13:37,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:37,869 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 20:13:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:38,114 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:13:38,115 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 20:13:38,326 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 20:13:38,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,436 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 20:13:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,618 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 20:13:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,695 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 20:13:38,696 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 20:13:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:38,763 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 20:13:38,778 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 20:13:38,976 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:39,023 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:39,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:39,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:39,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:39,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2021-11-25 20:13:39,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076210411] [2021-11-25 20:13:39,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:13:39,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:13:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:13:39,884 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 20:13:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,910 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-25 20:13:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:13:39,911 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 20:13:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,911 INFO L225 Difference]: With dead ends: 36 [2021-11-25 20:13:39,912 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:13:39,912 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 20:13:39,913 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 20:13:39,914 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 20:13:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:13:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-25 20:13:39,918 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 20:13:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-25 20:13:39,919 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2021-11-25 20:13:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,919 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-25 20:13:39,919 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 20:13:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-25 20:13:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:13:39,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,920 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 20:13:39,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:40,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:40,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash 160034795, now seen corresponding path program 2 times [2021-11-25 20:13:40,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921689028] [2021-11-25 20:13:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:40,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:40,227 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 20:13:40,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:40,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921689028] [2021-11-25 20:13:40,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921689028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:40,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010749766] [2021-11-25 20:13:40,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:40,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:40,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:40,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:40,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:13:40,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:13:40,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:13:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:40,362 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 20:13:40,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:40,419 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 20:13:40,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010749766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107867133] [2021-11-25 20:13:40,422 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:40,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:40,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:40,423 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:40,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,458 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:13:40,458 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 20:13:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,484 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:40,485 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 20:13:40,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,518 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 20:13:40,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,639 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:13:40,640 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 20:13:40,693 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 20:13:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,758 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 20:13:40,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:40,904 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 20:13:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,952 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:13:40,952 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 20:13:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:40,986 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 20:13:40,999 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 20:13:41,139 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:41,183 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:44,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (exists ((v_bor_~res~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_11 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_11 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:44,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:44,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:44,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 20:13:44,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925738371] [2021-11-25 20:13:44,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:44,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:13:44,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:13:44,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:13:44,160 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 20:13:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:44,195 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2021-11-25 20:13:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:13:44,197 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 20:13:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:44,198 INFO L225 Difference]: With dead ends: 38 [2021-11-25 20:13:44,198 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:13:44,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:13:44,200 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 20:13:44,200 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 20:13:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:13:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 20:13:44,208 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 20:13:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 20:13:44,213 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2021-11-25 20:13:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:44,213 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 20:13:44,214 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 20:13:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 20:13:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 20:13:44,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:44,216 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 20:13:44,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:44,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:44,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1885684020, now seen corresponding path program 3 times [2021-11-25 20:13:44,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:44,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060062346] [2021-11-25 20:13:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:44,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:44,493 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 20:13:44,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:44,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060062346] [2021-11-25 20:13:44,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060062346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:44,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173403980] [2021-11-25 20:13:44,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:13:44,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:44,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:44,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:13:44,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:13:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:44,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:13:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:44,682 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 20:13:44,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:44,800 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 20:13:44,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173403980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088470451] [2021-11-25 20:13:44,803 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:44,803 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:44,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:44,804 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:44,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:44,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,839 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:13:44,839 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 20:13:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,868 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:44,869 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 20:13:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,902 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 20:13:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:44,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:45,034 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:13:45,035 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 20:13:45,173 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 20:13:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,242 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 20:13:45,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:45,361 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 20:13:45,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,417 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:13:45,418 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 20:13:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:45,448 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 20:13:45,460 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 20:13:45,602 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:45,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:50,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:50,544 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:50,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:50,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2021-11-25 20:13:50,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055717297] [2021-11-25 20:13:50,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:13:50,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:13:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:13:50,547 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 20:13:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:50,603 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-25 20:13:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:13:50,604 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 20:13:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:50,604 INFO L225 Difference]: With dead ends: 49 [2021-11-25 20:13:50,604 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:13:50,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:13:50,607 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 20:13:50,607 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 20:13:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:13:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:13:50,616 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 20:13:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-25 20:13:50,617 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2021-11-25 20:13:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:50,617 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-25 20:13:50,617 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 20:13:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-25 20:13:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:13:50,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:50,619 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 20:13:50,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:50,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:50,829 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash 210425085, now seen corresponding path program 4 times [2021-11-25 20:13:50,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:50,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772813765] [2021-11-25 20:13:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:50,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:50,973 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 20:13:50,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772813765] [2021-11-25 20:13:50,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772813765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981070497] [2021-11-25 20:13:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:50,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:50,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:50,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:13:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:13:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:51,139 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 20:13:51,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:51,396 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 20:13:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981070497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041720698] [2021-11-25 20:13:51,398 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:51,399 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:51,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:51,399 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:51,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,432 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:51,433 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 20:13:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,443 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 20:13:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,471 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 20:13:51,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,585 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:13:51,585 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 20:13:51,631 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 20:13:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,685 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 20:13:51,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:13:51,790 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 20:13:51,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,845 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:13:51,846 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 20:13:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:51,877 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 20:13:51,889 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 20:13:52,020 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:52,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:56,815 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))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:56,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:56,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2021-11-25 20:13:56,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842351986] [2021-11-25 20:13:56,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:56,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:13:56,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:13:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:13:56,818 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 20:13:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:56,880 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-25 20:13:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:13:56,881 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 20:13:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:56,882 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:13:56,882 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:13:56,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:13:56,883 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:56,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:13:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 20:13:56,887 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 20:13:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-25 20:13:56,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2021-11-25 20:13:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-25 20:13:56,889 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 20:13:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-25 20:13:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:13:56,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:56,891 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 20:13:56,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:57,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:13:57,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1481216765, now seen corresponding path program 5 times [2021-11-25 20:13:57,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:57,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944876816] [2021-11-25 20:13:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:57,507 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 20:13:57,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944876816] [2021-11-25 20:13:57,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944876816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245874266] [2021-11-25 20:13:57,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:57,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:57,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:57,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:57,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:13:57,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:13:57,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:13:57,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:57,743 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 20:13:57,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:57,919 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 20:13:57,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245874266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657808103] [2021-11-25 20:13:57,922 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:13:57,922 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:57,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:57,923 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:57,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:57,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:57,971 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:13:57,971 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 20:13:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:57,982 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 20:13:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,006 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 20:13:58,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,108 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:13:58,109 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 20:13:58,163 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 20:13:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,215 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 20:13:58,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,311 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 20:13:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,366 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 20:13:58,366 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 20:13:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:13:58,423 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 20:13:58,433 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 20:13:58,550 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:13:58,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:01,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_30 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_30 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_30 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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:01,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:01,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-11-25 20:14:01,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65445091] [2021-11-25 20:14:01,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:01,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 20:14:01,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 20:14:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:14:01,631 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 20:14:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:01,714 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-25 20:14:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:14:01,715 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 20:14:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:01,716 INFO L225 Difference]: With dead ends: 69 [2021-11-25 20:14:01,716 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 20:14:01,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:14:01,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 20:14:01,718 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 20:14:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 20:14:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-25 20:14:01,724 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 20:14:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-25 20:14:01,725 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2021-11-25 20:14:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:01,726 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-25 20:14:01,726 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 20:14:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-25 20:14:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 20:14:01,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:01,728 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 20:14:01,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:01,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:01,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash -10477499, now seen corresponding path program 6 times [2021-11-25 20:14:01,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:01,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546281094] [2021-11-25 20:14:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:01,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:02,301 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 20:14:02,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546281094] [2021-11-25 20:14:02,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546281094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870903009] [2021-11-25 20:14:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:02,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:02,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:02,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:14:02,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:02,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:02,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:14:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:02,562 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 20:14:02,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:03,324 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 20:14:03,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870903009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:03,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588770932] [2021-11-25 20:14:03,327 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:14:03,327 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:03,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:03,328 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:03,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,361 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:14:03,361 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 20:14:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,372 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 20:14:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,398 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 20:14:03,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,500 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:14:03,501 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 20:14:03,542 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 20:14:03,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,596 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 20:14:03,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,699 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 20:14:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,750 INFO L354 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2021-11-25 20:14:03,751 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 20:14:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:03,795 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 20:14:03,807 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 20:14:03,923 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:14:03,953 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:06,968 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))))) (<= 99999 |ULTIMATE.start_main_~i~2#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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:06,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:06,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:06,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2021-11-25 20:14:06,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535295763] [2021-11-25 20:14:06,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:06,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:14:06,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:14:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 20:14:06,972 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 20:14:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:07,089 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2021-11-25 20:14:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 20:14:07,090 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 20:14:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:07,093 INFO L225 Difference]: With dead ends: 100 [2021-11-25 20:14:07,093 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 20:14:07,095 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 20:14:07,097 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 20:14:07,097 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 20:14:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 20:14:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-25 20:14:07,118 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 20:14:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-25 20:14:07,119 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2021-11-25 20:14:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:07,120 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-25 20:14:07,121 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 20:14:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-25 20:14:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:14:07,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:07,127 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 20:14:07,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:07,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:07,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1436572317, now seen corresponding path program 7 times [2021-11-25 20:14:07,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:07,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401516634] [2021-11-25 20:14:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:07,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:08,567 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 20:14:08,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401516634] [2021-11-25 20:14:08,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401516634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067213773] [2021-11-25 20:14:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:08,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:08,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:08,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:08,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:14:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 20:14:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:08,934 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 20:14:08,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:11,723 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 20:14:11,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067213773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820250434] [2021-11-25 20:14:11,725 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:14:11,725 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:11,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:11,726 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:11,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:11,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,770 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:14:11,771 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 20:14:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,780 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 20:14:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,806 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 20:14:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:11,913 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:14:11,913 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 20:14:12,032 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 20:14:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,080 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 20:14:12,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:12,205 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 20:14:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,248 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:14:12,249 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 20:14:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:12,282 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 20:14:12,293 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 20:14:12,419 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:14:12,450 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:15,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_42 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_42 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_42 4294967296) (- 4294967296))))) (<= 99999 |ULTIMATE.start_main_~i~2#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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:15,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:15,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:15,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2021-11-25 20:14:15,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559809025] [2021-11-25 20:14:15,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:15,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-25 20:14:15,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-25 20:14:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 20:14:15,702 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 20:14:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:15,998 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2021-11-25 20:14:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-25 20:14:15,999 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 20:14:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:16,000 INFO L225 Difference]: With dead ends: 150 [2021-11-25 20:14:16,000 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 20:14:16,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 20:14:16,008 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 20:14:16,009 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 20:14:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 20:14:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-25 20:14:16,030 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 20:14:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-11-25 20:14:16,033 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2021-11-25 20:14:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:16,035 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-11-25 20:14:16,035 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 20:14:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-11-25 20:14:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-25 20:14:16,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:16,039 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 20:14:16,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:16,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:16,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1773791133, now seen corresponding path program 8 times [2021-11-25 20:14:16,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:16,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267213556] [2021-11-25 20:14:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:16,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:20,130 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 20:14:20,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267213556] [2021-11-25 20:14:20,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267213556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785380721] [2021-11-25 20:14:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:20,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:20,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:20,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:20,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:14:20,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:14:20,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:14:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:20,643 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 20:14:20,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:20,960 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 20:14:20,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785380721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:20,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192989744] [2021-11-25 20:14:20,962 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:14:20,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:20,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:20,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:20,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,011 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:14:21,011 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 20:14:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,035 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:14:21,036 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 20:14:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,060 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 20:14:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,163 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:14:21,164 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 20:14:21,212 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 20:14:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,263 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 30 treesize of output 20 [2021-11-25 20:14:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:21,372 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 20:14:21,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,445 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:14:21,445 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 20:14:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:21,472 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 20:14:21,484 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 20:14:21,606 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:14:21,643 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:25,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#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))))) (= |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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:25,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:25,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:25,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2021-11-25 20:14:25,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693196363] [2021-11-25 20:14:25,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:25,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-25 20:14:25,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-25 20:14:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 20:14:25,305 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 20:14:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:25,465 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-11-25 20:14:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-25 20:14:25,466 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 20:14:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:25,467 INFO L225 Difference]: With dead ends: 155 [2021-11-25 20:14:25,468 INFO L226 Difference]: Without dead ends: 130 [2021-11-25 20:14:25,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 20:14:25,471 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 20:14:25,472 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 20:14:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-25 20:14:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-25 20:14:25,479 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 20:14:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-11-25 20:14:25,480 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2021-11-25 20:14:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:25,481 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-11-25 20:14:25,481 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 20:14:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-11-25 20:14:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-25 20:14:25,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:25,483 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 20:14:25,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:25,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:14:25,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1239752187, now seen corresponding path program 9 times [2021-11-25 20:14:25,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605988855] [2021-11-25 20:14:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:25,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:29,533 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 20:14:29,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605988855] [2021-11-25 20:14:29,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605988855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608385174] [2021-11-25 20:14:29,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:29,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:29,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:29,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:29,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:14:29,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:29,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-25 20:14:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:30,183 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 20:14:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:40,725 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 20:14:40,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608385174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:40,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063188285] [2021-11-25 20:14:40,728 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:14:40,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:40,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:40,728 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:40,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,757 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:14:40,757 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 20:14:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,765 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 20:14:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,782 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 20:14:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:40,905 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-25 20:14:40,906 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 20:14:40,962 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 20:14:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,014 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 20:14:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:14:41,110 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 20:14:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,147 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:14:41,147 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 20:14:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:14:41,174 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 20:14:41,187 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 20:14:41,286 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:14:41,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:44,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#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|) (exists ((v_bor_~res~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:44,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:44,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:44,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2021-11-25 20:14:44,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913856617] [2021-11-25 20:14:44,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:44,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-25 20:14:44,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-25 20:14:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-25 20:14:44,941 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 20:14:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:45,409 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2021-11-25 20:14:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-25 20:14:45,410 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 20:14:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:45,412 INFO L225 Difference]: With dead ends: 260 [2021-11-25 20:14:45,412 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 20:14:45,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2021-11-25 20:14:45,417 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 20:14:45,417 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 20:14:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 20:14:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-25 20:14:45,426 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 20:14:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2021-11-25 20:14:45,428 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2021-11-25 20:14:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:45,428 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2021-11-25 20:14:45,429 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 20:14:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2021-11-25 20:14:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-25 20:14:45,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:45,433 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 20:14:45,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:45,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:14:45,639 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:45,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2122053027, now seen corresponding path program 10 times [2021-11-25 20:14:45,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:45,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334428704] [2021-11-25 20:14:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:45,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:00,500 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 20:15:00,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334428704] [2021-11-25 20:15:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334428704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697888310] [2021-11-25 20:15:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:15:00,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:00,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:00,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:15:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:00,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-25 20:15:01,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:01,641 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 20:15:01,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:43,381 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 20:15:43,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697888310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120798941] [2021-11-25 20:15:43,383 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:15:43,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:43,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:43,384 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:43,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,414 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:15:43,414 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 20:15:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,422 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 20:15:43,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,445 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 20:15:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:43,544 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:15:43,545 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 20:15:43,650 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 20:15:43,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,702 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 20:15:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:43,807 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 20:15:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,857 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:15:43,857 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 20:15:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:15:43,885 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 20:15:43,895 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 20:15:44,028 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:15:44,082 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:52,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.offset| 0) (<= 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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:52,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:52,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:52,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2021-11-25 20:15:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913076327] [2021-11-25 20:15:52,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-25 20:15:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-25 20:15:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81869, Invalid=92436, Unknown=1, NotChecked=0, Total=174306 [2021-11-25 20:15:52,739 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 20:15:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:54,702 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2021-11-25 20:15:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-25 20:15:54,703 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 20:15:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:54,706 INFO L225 Difference]: With dead ends: 462 [2021-11-25 20:15:54,706 INFO L226 Difference]: Without dead ends: 433 [2021-11-25 20:15:54,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=81869, Invalid=92436, Unknown=1, NotChecked=0, Total=174306 [2021-11-25 20:15:54,717 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 20:15:54,718 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 20:15:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-25 20:15:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2021-11-25 20:15:54,734 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 20:15:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2021-11-25 20:15:54,737 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2021-11-25 20:15:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:54,737 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2021-11-25 20:15:54,738 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 20:15:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2021-11-25 20:15:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-11-25 20:15:54,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:54,748 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 20:15:54,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:54,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:54,965 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1384698717, now seen corresponding path program 11 times [2021-11-25 20:15:54,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:54,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076926606] [2021-11-25 20:15:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:54,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:52,324 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 20:16:52,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076926606] [2021-11-25 20:16:52,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076926606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:52,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190793000] [2021-11-25 20:16:52,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:52,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:52,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:52,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:52,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:16:52,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 20:16:52,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:52,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:16:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:54,477 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 20:16:54,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:56,065 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 20:16:56,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190793000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [476766462] [2021-11-25 20:16:56,068 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:16:56,068 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:56,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:56,068 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:56,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,107 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:16:56,107 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 20:16:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,114 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 20:16:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,136 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 20:16:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:16:56,250 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:16:56,250 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 20:16:56,346 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 20:16:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,415 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 20:16:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:16:56,505 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 20:16:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,542 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-25 20:16:56,542 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 20:16:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:16:56,565 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 20:16:56,579 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 20:16:56,694 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:16:56,728 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:05,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_bor_~res~0_BEFORE_RETURN_65 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_65 4294967296) (- 4294967296))))) (<= |#NULL.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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:05,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:05,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:05,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2021-11-25 20:17:05,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588122799] [2021-11-25 20:17:05,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2021-11-25 20:17:05,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2021-11-25 20:17:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2021-11-25 20:17:05,355 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 20:17:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:07,328 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2021-11-25 20:17:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2021-11-25 20:17:07,329 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 20:17:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:07,332 INFO L225 Difference]: With dead ends: 471 [2021-11-25 20:17:07,332 INFO L226 Difference]: Without dead ends: 442 [2021-11-25 20:17:07,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2021-11-25 20:17:07,342 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 20:17:07,342 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 20:17:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-25 20:17:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-11-25 20:17:07,360 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 20:17:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2021-11-25 20:17:07,362 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2021-11-25 20:17:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:07,363 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2021-11-25 20:17:07,364 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 20:17:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2021-11-25 20:17:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-11-25 20:17:07,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:07,375 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 20:17:07,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 20:17:07,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:17:07,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1722644091, now seen corresponding path program 12 times [2021-11-25 20:17:07,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970080256] [2021-11-25 20:17:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:07,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:04,531 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 20:18:04,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970080256] [2021-11-25 20:18:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970080256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244570904] [2021-11-25 20:18:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:18:04,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:04,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:04,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:18:05,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:18:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 3953 conjuncts, 405 conjunts are in the unsatisfiable core [2021-11-25 20:18:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:06,393 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 20:18:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:57,759 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 20:20:57,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244570904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594115234] [2021-11-25 20:20:57,761 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:20:57,761 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:57,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:57,761 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:57,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,797 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:57,797 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 20:20:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,807 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 20:20:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,827 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 20:20:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:57,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:57,916 INFO L354 Elim1Store]: treesize reduction 138, result has 20.2 percent of original size [2021-11-25 20:20:57,917 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 20:20:57,994 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 20:20:58,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,037 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 20:20:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,126 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 20:20:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,168 INFO L354 Elim1Store]: treesize reduction 60, result has 32.6 percent of original size [2021-11-25 20:20:58,168 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 20:20:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:58,228 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 20:20:58,240 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 20:20:58,351 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2021-11-25 20:20:58,381 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:21:04,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#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)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2021-11-25 20:21:04,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:21:04,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:04,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2021-11-25 20:21:04,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204767752] [2021-11-25 20:21:04,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:21:04,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2021-11-25 20:21:04,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2021-11-25 20:21:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-25 20:21:05,038 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 20:21:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:19,182 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2021-11-25 20:21:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-11-25 20:21:19,183 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 20:21:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:19,189 INFO L225 Difference]: With dead ends: 884 [2021-11-25 20:21:19,189 INFO L226 Difference]: Without dead ends: 847 [2021-11-25 20:21:19,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 231.8s TimeCoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2021-11-25 20:21:19,248 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 20:21:19,248 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 20:21:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-11-25 20:21:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2021-11-25 20:21:19,278 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 20:21:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2021-11-25 20:21:19,283 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2021-11-25 20:21:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2021-11-25 20:21:19,285 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 20:21:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2021-11-25 20:21:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2021-11-25 20:21:19,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:19,295 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 20:21:19,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:19,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb61909a-83df-4acc-83d0-2593e5aabb75/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:21:19,498 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1210105379, now seen corresponding path program 13 times [2021-11-25 20:21:19,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:19,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182652782] [2021-11-25 20:21:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:19,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat