./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.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_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/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_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/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_bf908851-56ce-4831-8213-98aa9d3581e0/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 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:53:08,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:53:08,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:53:08,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:53:08,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:53:08,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:53:08,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:53:08,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:53:08,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:53:08,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:53:08,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:53:08,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:53:08,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:53:08,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:53:08,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:53:08,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:53:08,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:53:08,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:53:08,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:53:08,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:53:08,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:53:08,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:53:08,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:53:08,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:53:08,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:53:08,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:53:08,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:53:08,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:53:08,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:53:08,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:53:08,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:53:08,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:53:08,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:53:08,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:53:08,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:53:08,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:53:08,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:53:08,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:53:08,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:53:08,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:53:08,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:53:08,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:53:08,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:53:08,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:53:08,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:53:08,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:53:08,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:53:08,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:53:08,388 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:53:08,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:53:08,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:53:08,389 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:53:08,389 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:53:08,389 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:53:08,389 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:53:08,389 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:53:08,390 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:53:08,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:53:08,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:53:08,390 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:53:08,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:53:08,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:53:08,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:53:08,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:53:08,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:53:08,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:53:08,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:53:08,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:53:08,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:53:08,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:53:08,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:53:08,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:53:08,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:53:08,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:53:08,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:08,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:53:08,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:53:08,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:53:08,395 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:53:08,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:53:08,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:53:08,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:53:08,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:53:08,396 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_bf908851-56ce-4831-8213-98aa9d3581e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2021-11-25 18:53:08,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:53:08,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:53:08,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:53:08,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:53:08,734 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:53:08,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-25 18:53:08,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/data/582c54262/933266296bcf44cdbd9105b2006c2dfa/FLAG17814e26e [2021-11-25 18:53:09,291 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:53:09,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-11-25 18:53:09,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/data/582c54262/933266296bcf44cdbd9105b2006c2dfa/FLAG17814e26e [2021-11-25 18:53:09,670 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/data/582c54262/933266296bcf44cdbd9105b2006c2dfa [2021-11-25 18:53:09,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:53:09,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:53:09,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:09,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:53:09,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:53:09,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d12348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09, skipping insertion in model container [2021-11-25 18:53:09,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:53:09,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:53:09,864 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_bf908851-56ce-4831-8213-98aa9d3581e0/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-25 18:53:09,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:09,897 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:53:09,907 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_bf908851-56ce-4831-8213-98aa9d3581e0/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2021-11-25 18:53:09,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:53:09,924 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:53:09,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09 WrapperNode [2021-11-25 18:53:09,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:53:09,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:09,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:53:09,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:53:09,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,964 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-25 18:53:09,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:53:09,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:53:09,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:53:09,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:53:09,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:09,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:53:09,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:53:09,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:53:09,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:53:09,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (1/1) ... [2021-11-25 18:53:10,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:53:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:10,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:53:10,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:53:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:53:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:53:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:53:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:53:10,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:53:10,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:53:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:53:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:53:10,131 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:53:10,132 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:53:10,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:53:10,298 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:53:10,298 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:53:10,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:10 BoogieIcfgContainer [2021-11-25 18:53:10,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:53:10,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:53:10,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:53:10,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:53:10,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:53:09" (1/3) ... [2021-11-25 18:53:10,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428f7968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:10, skipping insertion in model container [2021-11-25 18:53:10,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:53:09" (2/3) ... [2021-11-25 18:53:10,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428f7968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:10, skipping insertion in model container [2021-11-25 18:53:10,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:10" (3/3) ... [2021-11-25 18:53:10,318 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2021-11-25 18:53:10,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:53:10,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:53:10,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:53:10,378 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 18:53:10,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:53:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:53:10,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:10,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:10,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1167627734, now seen corresponding path program 1 times [2021-11-25 18:53:10,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:10,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991827156] [2021-11-25 18:53:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:10,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:10,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991827156] [2021-11-25 18:53:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991827156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:10,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:10,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:53:10,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476766991] [2021-11-25 18:53:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:10,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:53:10,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:53:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:53:10,663 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:10,710 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2021-11-25 18:53:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:53:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:53:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:10,720 INFO L225 Difference]: With dead ends: 22 [2021-11-25 18:53:10,721 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:53:10,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:53:10,727 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:10,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:53:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:53:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 18:53:10,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-25 18:53:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:10,759 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 18:53:10,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 18:53:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:53:10,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:10,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:10,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:53:10,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash 250954131, now seen corresponding path program 1 times [2021-11-25 18:53:10,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655225363] [2021-11-25 18:53:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:10,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:10,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:10,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655225363] [2021-11-25 18:53:10,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655225363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:10,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:10,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:53:10,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257553966] [2021-11-25 18:53:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:10,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:10,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:10,825 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:10,843 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-25 18:53:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:53:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:10,845 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:53:10,845 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 18:53:10,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:10,847 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:10,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 18:53:10,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 18:53:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-25 18:53:10,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-25 18:53:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:10,853 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-25 18:53:10,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-25 18:53:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:53:10,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:10,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:10,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:53:10,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 802215450, now seen corresponding path program 1 times [2021-11-25 18:53:10,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:10,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903519336] [2021-11-25 18:53:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:10,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:10,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:10,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903519336] [2021-11-25 18:53:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903519336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:10,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90649174] [2021-11-25 18:53:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:10,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:10,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:10,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:53:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:53:10,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:11,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:53:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90649174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305649279] [2021-11-25 18:53:11,157 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:53:11,157 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:11,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:11,185 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:11,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,376 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:11,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:53:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:11,728 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:53:11,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:53:11,844 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 18:53:11,932 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [305649279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:12,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:12,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2021-11-25 18:53:12,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197632574] [2021-11-25 18:53:12,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:12,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:53:12,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:12,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:53:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:53:12,147 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:12,206 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-25 18:53:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:53:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:53:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:12,210 INFO L225 Difference]: With dead ends: 23 [2021-11-25 18:53:12,210 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 18:53:12,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:53:12,215 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:12,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 18:53:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-25 18:53:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-25 18:53:12,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-11-25 18:53:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:12,232 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-25 18:53:12,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-25 18:53:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:53:12,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:12,234 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:12,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:12,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:12,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1187067622, now seen corresponding path program 1 times [2021-11-25 18:53:12,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:12,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365486008] [2021-11-25 18:53:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:12,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:12,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:12,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365486008] [2021-11-25 18:53:12,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365486008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:12,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333944536] [2021-11-25 18:53:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:12,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:12,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:53:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:53:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:12,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:12,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333944536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997394092] [2021-11-25 18:53:12,674 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:53:12,674 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:12,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:12,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:12,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:12,791 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:53:12,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:53:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:12,862 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:12,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:53:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:13,048 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:53:13,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-25 18:53:13,192 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 18:53:13,243 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:53:13,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-25 18:53:13,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:13,296 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:13,405 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:13,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:13,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:13,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '285#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:13,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:13,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:13,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 18:53:13,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952725179] [2021-11-25 18:53:13,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:13,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:53:13,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:53:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:53:13,767 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:13,790 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-25 18:53:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:53:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:53:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:13,791 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:53:13,791 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:53:13,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:53:13,793 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:13,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:53:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:53:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-25 18:53:13,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-25 18:53:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:13,798 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-25 18:53:13,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-25 18:53:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:53:13,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:13,799 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:13,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:14,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:14,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash 59351519, now seen corresponding path program 2 times [2021-11-25 18:53:14,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:14,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846622325] [2021-11-25 18:53:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:14,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:53:14,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:14,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846622325] [2021-11-25 18:53:14,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846622325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740432825] [2021-11-25 18:53:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:53:14,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:14,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:14,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:14,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:53:14,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:53:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:53:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:14,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:53:14,294 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 15 treesize of output 15 [2021-11-25 18:53:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:53:14,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:14,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:53:14,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2021-11-25 18:53:14,476 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-25 18:53:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 18:53:14,502 INFO L354 Elim1Store]: treesize reduction 22, result has 33.3 percent of original size [2021-11-25 18:53:14,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 53 [2021-11-25 18:53:14,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 12 [2021-11-25 18:53:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,578 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-25 18:53:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 36 [2021-11-25 18:53:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-25 18:53:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:53:14,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740432825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542010397] [2021-11-25 18:53:14,703 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 18:53:14,703 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:14,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:14,704 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:14,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:14,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,754 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:14,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:53:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:14,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:14,890 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:53:14,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-25 18:53:15,023 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 18:53:15,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:15,065 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:15,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:53:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:15,106 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:15,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:15,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:15,184 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:15,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:15,194 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:15,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:15,543 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:15,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:15,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2021-11-25 18:53:15,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696866948] [2021-11-25 18:53:15,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:15,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:53:15,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:53:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:53:15,546 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:15,739 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-25 18:53:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:53:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:53:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:15,740 INFO L225 Difference]: With dead ends: 35 [2021-11-25 18:53:15,740 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 18:53:15,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:53:15,741 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:15,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 18:53:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-11-25 18:53:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-25 18:53:15,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2021-11-25 18:53:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:15,746 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-25 18:53:15,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-25 18:53:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:53:15,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:15,747 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:15,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:15,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:15,948 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:15,949 INFO L85 PathProgramCache]: Analyzing trace with hash -803985518, now seen corresponding path program 1 times [2021-11-25 18:53:15,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:15,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151162465] [2021-11-25 18:53:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:15,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:53:16,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151162465] [2021-11-25 18:53:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151162465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:16,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833723175] [2021-11-25 18:53:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:16,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:16,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:16,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:53:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:53:16,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:53:16,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:53:16,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833723175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033286516] [2021-11-25 18:53:16,211 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:16,211 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:16,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:16,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:16,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,259 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:16,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:53:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:16,382 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:53:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:53:16,444 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 18:53:16,479 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:53:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-25 18:53:16,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:16,525 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:16,774 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:16,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:16,781 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:17,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '672#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:17,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:17,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:17,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-25 18:53:17,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413332376] [2021-11-25 18:53:17,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:17,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:53:17,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:53:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:53:17,173 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:17,206 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-25 18:53:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:53:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:53:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:17,208 INFO L225 Difference]: With dead ends: 42 [2021-11-25 18:53:17,208 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 18:53:17,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:53:17,209 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:17,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 18:53:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-25 18:53:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-25 18:53:17,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2021-11-25 18:53:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:17,215 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-25 18:53:17,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-25 18:53:17,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:53:17,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:17,217 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:17,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:17,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:53:17,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 571138891, now seen corresponding path program 2 times [2021-11-25 18:53:17,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:17,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459249185] [2021-11-25 18:53:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:17,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:53:17,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459249185] [2021-11-25 18:53:17,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459249185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:17,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878561953] [2021-11-25 18:53:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:53:17,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:17,679 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:17,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:53:17,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:53:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:53:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-25 18:53:17,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:18,070 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-25 18:53:18,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-25 18:53:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-25 18:53:18,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878561953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:18,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638418783] [2021-11-25 18:53:18,137 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:18,137 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:18,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:18,138 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:18,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,193 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:18,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:18,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:18,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:53:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:18,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:18,332 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:53:18,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-25 18:53:18,460 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 16 treesize of output 12 [2021-11-25 18:53:18,495 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:53:18,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-25 18:53:18,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:18,532 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:18,773 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:18,779 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:19,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '962#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:19,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:19,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:19,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2021-11-25 18:53:19,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661214616] [2021-11-25 18:53:19,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:19,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:53:19,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:53:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:53:19,241 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:19,586 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-25 18:53:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:53:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 18:53:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:19,588 INFO L225 Difference]: With dead ends: 59 [2021-11-25 18:53:19,588 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 18:53:19,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 18:53:19,590 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:19,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 18:53:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-11-25 18:53:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:19,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-25 18:53:19,597 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2021-11-25 18:53:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:19,597 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-25 18:53:19,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-25 18:53:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:53:19,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:19,599 INFO L514 BasicCegarLoop]: trace histogram [13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:19,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:19,821 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1693520930, now seen corresponding path program 3 times [2021-11-25 18:53:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991972338] [2021-11-25 18:53:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:19,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:19,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:19,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991972338] [2021-11-25 18:53:19,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991972338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578226619] [2021-11-25 18:53:19,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:53:19,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:19,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:19,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:53:20,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:53:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:53:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:20,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:20,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578226619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235159793] [2021-11-25 18:53:20,440 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:20,440 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:20,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:20,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:20,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,493 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:20,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:20,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:53:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:20,599 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:53:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:53:20,650 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 18:53:20,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:20,682 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:53:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:20,716 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:20,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:20,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:20,944 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:20,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:20,950 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:21,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1331#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:21,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:21,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:21,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2021-11-25 18:53:21,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165338138] [2021-11-25 18:53:21,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:21,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:53:21,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:53:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:53:21,270 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:21,325 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2021-11-25 18:53:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 18:53:21,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 18:53:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:21,326 INFO L225 Difference]: With dead ends: 62 [2021-11-25 18:53:21,326 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 18:53:21,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 18:53:21,328 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:21,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:53:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 18:53:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-25 18:53:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-25 18:53:21,337 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2021-11-25 18:53:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:21,337 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-25 18:53:21,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-25 18:53:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:53:21,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:21,339 INFO L514 BasicCegarLoop]: trace histogram [28, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:21,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:21,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:21,553 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1024276521, now seen corresponding path program 4 times [2021-11-25 18:53:21,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:21,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308836042] [2021-11-25 18:53:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:21,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:22,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308836042] [2021-11-25 18:53:22,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308836042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991470950] [2021-11-25 18:53:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:53:22,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:22,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:22,019 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:22,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:53:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:53:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:22,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:23,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991470950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:23,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123922103] [2021-11-25 18:53:23,232 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:23,233 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:23,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:23,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:23,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,285 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:53:23,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:53:23,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,324 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:53:23,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:23,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:23,422 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:53:23,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-25 18:53:23,553 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 18:53:23,611 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:53:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-25 18:53:23,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:23,646 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:23,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:23,870 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:23,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:23,875 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:24,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1835#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:24,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:24,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2021-11-25 18:53:24,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816188999] [2021-11-25 18:53:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-25 18:53:24,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-25 18:53:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 18:53:24,271 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:24,386 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2021-11-25 18:53:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-25 18:53:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-25 18:53:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:24,397 INFO L225 Difference]: With dead ends: 92 [2021-11-25 18:53:24,397 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 18:53:24,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 18:53:24,402 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:24,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 18:53:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-25 18:53:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-11-25 18:53:24,429 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 45 [2021-11-25 18:53:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:24,431 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-11-25 18:53:24,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-11-25 18:53:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 18:53:24,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:24,441 INFO L514 BasicCegarLoop]: trace histogram [58, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:24,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:24,657 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1698972425, now seen corresponding path program 5 times [2021-11-25 18:53:24,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233011141] [2021-11-25 18:53:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:24,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:53:26,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233011141] [2021-11-25 18:53:26,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233011141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621919742] [2021-11-25 18:53:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:53:26,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:26,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:26,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:53:26,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:53:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:53:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:26,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:53:26,745 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 19 treesize of output 19 [2021-11-25 18:53:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-11-25 18:53:26,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:27,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:53:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2021-11-25 18:53:27,240 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-25 18:53:27,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2021-11-25 18:53:27,256 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:53:27,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 29 [2021-11-25 18:53:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 18:53:27,271 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 18:53:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 1 [2021-11-25 18:53:27,281 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:53:27,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2021-11-25 18:53:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-11-25 18:53:27,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621919742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:27,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309196741] [2021-11-25 18:53:27,473 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:27,473 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:27,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:27,474 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:27,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:27,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,517 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:53:27,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:53:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,551 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:53:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:27,657 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:53:27,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:53:27,719 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 18:53:27,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:27,752 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:27,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:53:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:27,790 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:28,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:28,008 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:28,013 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:28,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2650#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:28,756 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:28,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:28,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 71 [2021-11-25 18:53:28,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413552883] [2021-11-25 18:53:28,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-25 18:53:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-25 18:53:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1889, Invalid=4273, Unknown=0, NotChecked=0, Total=6162 [2021-11-25 18:53:28,761 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:31,130 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-11-25 18:53:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-25 18:53:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-25 18:53:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:31,132 INFO L225 Difference]: With dead ends: 100 [2021-11-25 18:53:31,132 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 18:53:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5621, Invalid=13839, Unknown=0, NotChecked=0, Total=19460 [2021-11-25 18:53:31,140 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 54 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:53:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 18:53:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-11-25 18:53:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-11-25 18:53:31,170 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2021-11-25 18:53:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:31,171 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-11-25 18:53:31,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-11-25 18:53:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 18:53:31,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:31,174 INFO L514 BasicCegarLoop]: trace histogram [59, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:31,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:31,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:53:31,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1118946774, now seen corresponding path program 6 times [2021-11-25 18:53:31,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:31,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136208695] [2021-11-25 18:53:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:31,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:32,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136208695] [2021-11-25 18:53:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136208695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:32,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393014503] [2021-11-25 18:53:32,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:53:32,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:32,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:32,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:32,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:53:32,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:53:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:53:32,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-25 18:53:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:36,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393014503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:36,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42049289] [2021-11-25 18:53:36,852 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:36,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:36,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:36,853 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:36,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:36,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:36,887 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:53:36,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:53:36,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:36,923 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:36,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:36,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:36,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:53:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:37,050 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 18:53:37,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 251 [2021-11-25 18:53:37,138 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 18:53:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:37,170 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:37,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:53:37,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:37,205 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:37,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:37,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:37,421 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:37,424 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:37,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3686#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:37,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:37,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:37,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2021-11-25 18:53:37,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473996317] [2021-11-25 18:53:37,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:37,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-25 18:53:37,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:37,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-25 18:53:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2021-11-25 18:53:37,965 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:38,150 INFO L93 Difference]: Finished difference Result 162 states and 226 transitions. [2021-11-25 18:53:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-25 18:53:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-25 18:53:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:38,151 INFO L225 Difference]: With dead ends: 162 [2021-11-25 18:53:38,152 INFO L226 Difference]: Without dead ends: 142 [2021-11-25 18:53:38,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2021-11-25 18:53:38,156 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:38,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:53:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-25 18:53:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-25 18:53:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-11-25 18:53:38,173 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 80 [2021-11-25 18:53:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:38,173 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-11-25 18:53:38,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-11-25 18:53:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 18:53:38,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:38,176 INFO L514 BasicCegarLoop]: trace histogram [120, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:38,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:53:38,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:38,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1302174211, now seen corresponding path program 7 times [2021-11-25 18:53:38,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:38,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26947731] [2021-11-25 18:53:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:38,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:43,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26947731] [2021-11-25 18:53:43,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26947731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:53:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091534152] [2021-11-25 18:53:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:53:43,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:53:43,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:53:43,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:53:43,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:53:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-25 18:53:43,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:53:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:43,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:53:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:53:57,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091534152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:53:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300739808] [2021-11-25 18:53:57,880 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:53:57,880 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:53:57,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:53:57,880 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:53:57,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:53:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,922 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:53:57,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:53:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 18:53:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:53:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:53:58,009 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:53:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:53:58,051 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 18:53:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:58,080 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:58,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:53:58,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:58,122 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:58,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:53:58,351 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:53:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:53:58,359 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:53:59,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5333#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:53:59,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:53:59,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:53:59,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2021-11-25 18:53:59,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010137764] [2021-11-25 18:53:59,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:53:59,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2021-11-25 18:53:59,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2021-11-25 18:53:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2021-11-25 18:53:59,209 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:59,944 INFO L93 Difference]: Finished difference Result 284 states and 409 transitions. [2021-11-25 18:53:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2021-11-25 18:53:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-25 18:53:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:59,946 INFO L225 Difference]: With dead ends: 284 [2021-11-25 18:53:59,946 INFO L226 Difference]: Without dead ends: 264 [2021-11-25 18:53:59,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2021-11-25 18:53:59,951 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:59,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:53:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-25 18:53:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-25 18:53:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2021-11-25 18:53:59,982 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 141 [2021-11-25 18:53:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:59,983 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2021-11-25 18:53:59,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:53:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2021-11-25 18:53:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-25 18:53:59,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:59,986 INFO L514 BasicCegarLoop]: trace histogram [242, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:00,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:00,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:54:00,205 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1683284125, now seen corresponding path program 8 times [2021-11-25 18:54:00,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:00,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395407273] [2021-11-25 18:54:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:00,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:54:19,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:19,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395407273] [2021-11-25 18:54:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395407273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:19,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344839165] [2021-11-25 18:54:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:54:19,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:19,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:19,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:54:19,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:54:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:54:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:54:19,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2021-11-25 18:54:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:21,833 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-11-25 18:54:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-25 18:54:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2021-11-25 18:54:22,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344839165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:22,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416032926] [2021-11-25 18:54:22,417 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:54:22,417 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:22,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:22,418 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:22,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,462 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:54:22,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:54:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,515 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:54:22,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:54:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:54:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:22,617 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:54:22,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:54:22,666 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 18:54:22,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:22,707 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:54:22,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 18:54:22,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:22,742 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:54:22,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:54:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:22,949 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:54:22,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:54:22,960 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:24,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8213#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:54:24,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:24,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:24,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [244, 10, 10] total 257 [2021-11-25 18:54:24,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085227130] [2021-11-25 18:54:24,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 258 states [2021-11-25 18:54:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2021-11-25 18:54:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29952, Invalid=40008, Unknown=0, NotChecked=0, Total=69960 [2021-11-25 18:54:24,444 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:47,315 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2021-11-25 18:54:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-11-25 18:54:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-25 18:54:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:47,319 INFO L225 Difference]: With dead ends: 305 [2021-11-25 18:54:47,319 INFO L226 Difference]: Without dead ends: 274 [2021-11-25 18:54:47,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 767 SyntacticMatches, 1 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36528 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=89743, Invalid=169847, Unknown=0, NotChecked=0, Total=259590 [2021-11-25 18:54:47,336 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:47,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 126 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:54:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-25 18:54:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2021-11-25 18:54:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2021-11-25 18:54:47,364 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2021-11-25 18:54:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:47,364 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2021-11-25 18:54:47,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2021-11-25 18:54:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-25 18:54:47,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:47,369 INFO L514 BasicCegarLoop]: trace histogram [243, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:47,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:54:47,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:54:47,570 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash 548327542, now seen corresponding path program 9 times [2021-11-25 18:54:47,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:47,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479270503] [2021-11-25 18:54:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:47,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:55:07,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:07,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479270503] [2021-11-25 18:55:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479270503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:07,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220933861] [2021-11-25 18:55:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:55:07,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:07,481 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:07,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:55:08,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:55:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:55:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2311 conjuncts, 245 conjunts are in the unsatisfiable core [2021-11-25 18:55:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:55:08,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:56:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:56:05,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220933861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:56:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101650709] [2021-11-25 18:56:05,571 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 18:56:05,571 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:56:05,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:56:05,572 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:56:05,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:56:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,613 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 18:56:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 18:56:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,647 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 18:56:05,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 18:56:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 18:56:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:05,723 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 18:56:05,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 18:56:05,788 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 18:56:05,821 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 18:56:05,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-11-25 18:56:05,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:05,871 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:56:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:56:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:06,060 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 18:56:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 18:56:06,065 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:56:07,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11864#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 18:56:07,610 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:56:07,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:56:07,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 245, 245] total 490 [2021-11-25 18:56:07,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699925013] [2021-11-25 18:56:07,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:56:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 491 states [2021-11-25 18:56:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 491 interpolants. [2021-11-25 18:56:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2021-11-25 18:56:07,636 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:11,861 INFO L93 Difference]: Finished difference Result 534 states and 782 transitions. [2021-11-25 18:56:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2021-11-25 18:56:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-25 18:56:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:11,867 INFO L225 Difference]: With dead ends: 534 [2021-11-25 18:56:11,867 INFO L226 Difference]: Without dead ends: 512 [2021-11-25 18:56:11,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 544 SyntacticMatches, 1 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6832 ImplicationChecksByTransitivity, 76.5s TimeCoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2021-11-25 18:56:11,878 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:11,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:56:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-25 18:56:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-25 18:56:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.00587084148728) internal successors, (514), 511 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2021-11-25 18:56:11,923 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 266 [2021-11-25 18:56:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:11,924 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2021-11-25 18:56:11,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:56:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2021-11-25 18:56:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-25 18:56:11,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:11,938 INFO L514 BasicCegarLoop]: trace histogram [488, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:11,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:12,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:56:12,153 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:56:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1986981775, now seen corresponding path program 10 times [2021-11-25 18:56:12,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805748493] [2021-11-25 18:56:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:12,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:57:29,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:29,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805748493] [2021-11-25 18:57:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805748493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:29,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471371857] [2021-11-25 18:57:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:57:29,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:29,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:29,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:57:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 4516 conjuncts, 490 conjunts are in the unsatisfiable core [2021-11-25 18:57:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 18:57:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 19:01:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471371857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78076077] [2021-11-25 19:01:22,927 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:01:22,927 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:01:22,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:01:22,927 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:01:22,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:01:22,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,969 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 19:01:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 19:01:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,012 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 19:01:23,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 19:01:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 19:01:23,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:23,108 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 19:01:23,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 250 [2021-11-25 19:01:23,149 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 19:01:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:23,183 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:01:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-25 19:01:23,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:23,217 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:01:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 19:01:23,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:23,430 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:01:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 19:01:23,446 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:01:26,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17945#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2021-11-25 19:01:26,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:01:26,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:01:26,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [490, 490, 490] total 980 [2021-11-25 19:01:26,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870966010] [2021-11-25 19:01:26,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:01:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 981 states [2021-11-25 19:01:26,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:01:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 981 interpolants. [2021-11-25 19:01:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480711, Invalid=494445, Unknown=0, NotChecked=0, Total=975156 [2021-11-25 19:01:26,245 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:01:52,742 INFO L93 Difference]: Finished difference Result 1024 states and 1517 transitions. [2021-11-25 19:01:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 980 states. [2021-11-25 19:01:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2021-11-25 19:01:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:01:52,752 INFO L225 Difference]: With dead ends: 1024 [2021-11-25 19:01:52,753 INFO L226 Difference]: Without dead ends: 1002 [2021-11-25 19:01:52,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2021 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 986 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12225 ImplicationChecksByTransitivity, 307.2s TimeCoverageRelationStatistics Valid=480711, Invalid=494445, Unknown=0, NotChecked=0, Total=975156 [2021-11-25 19:01:52,811 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:01:52,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:01:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-25 19:01:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2021-11-25 19:01:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.002997002997003) internal successors, (1004), 1001 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1004 transitions. [2021-11-25 19:01:52,898 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1004 transitions. Word has length 511 [2021-11-25 19:01:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:01:52,899 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1004 transitions. [2021-11-25 19:01:52,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:01:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1004 transitions. [2021-11-25 19:01:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2021-11-25 19:01:52,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:01:52,952 INFO L514 BasicCegarLoop]: trace histogram [978, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:01:52,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 19:01:53,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf908851-56ce-4831-8213-98aa9d3581e0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:01:53,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:01:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:01:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1747623407, now seen corresponding path program 11 times [2021-11-25 19:01:53,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:01:53,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800551485] [2021-11-25 19:01:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:53,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:01:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat