./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/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_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:13:36,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:13:36,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:13:36,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:13:36,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:13:36,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:13:36,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:13:36,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:13:36,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:13:36,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:13:36,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:13:36,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:13:36,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:13:36,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:13:36,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:13:36,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:13:36,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:13:36,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:13:36,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:13:36,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:13:36,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:13:36,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:13:36,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:13:36,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:13:36,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:13:36,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:13:36,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:13:36,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:13:36,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:13:36,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:13:36,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:13:36,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:13:36,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:13:36,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:13:36,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:13:36,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:13:36,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:13:36,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:13:36,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:13:36,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:13:36,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:13:36,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:13:36,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:13:36,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:13:36,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:13:36,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:13:36,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:13:36,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:13:36,430 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:13:36,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:13:36,430 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:13:36,431 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:13:36,431 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:13:36,431 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:13:36,432 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:13:36,432 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:13:36,433 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:13:36,433 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:13:36,433 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:13:36,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:13:36,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:13:36,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:13:36,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:13:36,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:13:36,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:13:36,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:13:36,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:13:36,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:13:36,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:13:36,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:13:36,438 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:13:36,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:13:36,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:13:36,440 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:13:36,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:13:36,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:13:36,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:13:36,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:13:36,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:13:36,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:13:36,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:13:36,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:13:36,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:13:36,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:13:36,443 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_532013a4-8144-4e13-bfab-7fdd23cb06ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2021-11-25 20:13:36,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:13:36,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:13:36,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:13:36,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:13:36,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:13:36,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-11-25 20:13:36,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/data/e5d33709a/bbb79922b6fd461e9c7a1b2348cc44d0/FLAG74fac9adc [2021-11-25 20:13:37,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:13:37,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2021-11-25 20:13:37,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/data/e5d33709a/bbb79922b6fd461e9c7a1b2348cc44d0/FLAG74fac9adc [2021-11-25 20:13:37,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/data/e5d33709a/bbb79922b6fd461e9c7a1b2348cc44d0 [2021-11-25 20:13:37,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:13:37,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:13:37,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:37,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:13:37,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:13:37,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:37" (1/1) ... [2021-11-25 20:13:37,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf039a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:37, skipping insertion in model container [2021-11-25 20:13:37,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:13:37" (1/1) ... [2021-11-25 20:13:37,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:13:37,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:13:38,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:38,096 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:13:38,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:13:38,213 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:13:38,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38 WrapperNode [2021-11-25 20:13:38,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:13:38,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:38,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:13:38,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:13:38,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,276 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-11-25 20:13:38,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:13:38,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:13:38,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:13:38,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:13:38,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:13:38,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:13:38,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:13:38,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:13:38,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (1/1) ... [2021-11-25 20:13:38,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:13:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:38,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:13:38,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:13:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:13:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:13:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:13:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:13:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:13:38,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:13:38,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:13:38,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:13:38,641 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:13:38,673 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:13:38,673 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:13:38,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:38 BoogieIcfgContainer [2021-11-25 20:13:38,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:13:38,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:13:38,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:13:38,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:13:38,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:13:37" (1/3) ... [2021-11-25 20:13:38,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea93455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:38, skipping insertion in model container [2021-11-25 20:13:38,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:13:38" (2/3) ... [2021-11-25 20:13:38,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea93455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:13:38, skipping insertion in model container [2021-11-25 20:13:38,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:38" (3/3) ... [2021-11-25 20:13:38,695 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2021-11-25 20:13:38,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:13:38,700 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-25 20:13:38,783 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:13:38,790 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:13:38,790 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-25 20:13:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 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 20:13:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:13:38,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:38,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:13:38,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash 88958, now seen corresponding path program 1 times [2021-11-25 20:13:38,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971629567] [2021-11-25 20:13:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:38,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,087 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 20:13:39,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971629567] [2021-11-25 20:13:39,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971629567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:39,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:39,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 20:13:39,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176523326] [2021-11-25 20:13:39,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:39,138 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:13:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,196 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-25 20:13:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-25 20:13:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,208 INFO L225 Difference]: With dead ends: 14 [2021-11-25 20:13:39,208 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 20:13:39,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:39,235 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:39,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 20:13:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 20:13:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 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 20:13:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 20:13:39,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2021-11-25 20:13:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,283 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 20:13:39,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:13:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 20:13:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:13:39,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:13:39,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:13:39,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 88959, now seen corresponding path program 1 times [2021-11-25 20:13:39,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948595613] [2021-11-25 20:13:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,394 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 20:13:39,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948595613] [2021-11-25 20:13:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948595613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:39,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:39,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:39,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446846926] [2021-11-25 20:13:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:13:39,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:13:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:13:39,401 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 20:13:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,469 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-25 20:13:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:13:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-11-25 20:13:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,471 INFO L225 Difference]: With dead ends: 24 [2021-11-25 20:13:39,471 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:13:39,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:39,478 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:39,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:13:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2021-11-25 20:13:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:13:39,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2021-11-25 20:13:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,487 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:13:39,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 20:13:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:13:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:13:39,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:13:39,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:13:39,489 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash 90363, now seen corresponding path program 1 times [2021-11-25 20:13:39,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:39,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175638858] [2021-11-25 20:13:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,538 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 20:13:39,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175638858] [2021-11-25 20:13:39,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175638858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:39,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:39,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 20:13:39,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320978900] [2021-11-25 20:13:39,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:39,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:39,542 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:13:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,559 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-25 20:13:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:39,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-25 20:13:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,560 INFO L225 Difference]: With dead ends: 14 [2021-11-25 20:13:39,561 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 20:13:39,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:39,562 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 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 20:13:39,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 20:13:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-25 20:13:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) 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 20:13:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-25 20:13:39,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2021-11-25 20:13:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,567 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-25 20:13:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:13:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-25 20:13:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:13:39,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:13:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:13:39,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2802126, now seen corresponding path program 1 times [2021-11-25 20:13:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:39,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858201250] [2021-11-25 20:13:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,639 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 20:13:39,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858201250] [2021-11-25 20:13:39,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858201250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:39,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:39,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:39,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325588803] [2021-11-25 20:13:39,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:39,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:39,642 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 20:13:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,665 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-25 20:13:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:39,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-25 20:13:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,668 INFO L225 Difference]: With dead ends: 13 [2021-11-25 20:13:39,668 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 20:13:39,668 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 20:13:39,677 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:39,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 20:13:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 20:13:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 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 20:13:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 20:13:39,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2021-11-25 20:13:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,683 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 20:13:39,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 20:13:39,683 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 20:13:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:13:39,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:13:39,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:13:39,685 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2802127, now seen corresponding path program 1 times [2021-11-25 20:13:39,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:39,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272764703] [2021-11-25 20:13:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,781 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 20:13:39,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272764703] [2021-11-25 20:13:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272764703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:39,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:39,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:39,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593435060] [2021-11-25 20:13:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:39,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:13:39,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:13:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:13:39,784 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 20:13:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:39,833 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 20:13:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:13:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-25 20:13:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:39,835 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:13:39,835 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:13:39,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:39,837 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:39,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:13:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-25 20:13:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) 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 20:13:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-25 20:13:39,840 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2021-11-25 20:13:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:39,840 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-25 20:13:39,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 20:13:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-25 20:13:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:13:39,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:39,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-25 20:13:39,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:13:39,842 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash 85522820, now seen corresponding path program 1 times [2021-11-25 20:13:39,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:39,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865213003] [2021-11-25 20:13:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:39,970 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865213003] [2021-11-25 20:13:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865213003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:39,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814738859] [2021-11-25 20:13:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:39,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:39,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:39,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:13:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:40,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:13:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814738859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990107245] [2021-11-25 20:13:40,327 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-25 20:13:40,327 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:40,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:40,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:40,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:40,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:40,500 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 14 treesize of output 10 [2021-11-25 20:13:40,575 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 14 treesize of output 10 [2021-11-25 20:13:40,609 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:40,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226#(and (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet7#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~nondet7#1| 127) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:40,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:40,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:40,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2021-11-25 20:13:40,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268169110] [2021-11-25 20:13:40,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:40,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:13:40,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:13:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:13:40,858 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 20:13:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:40,990 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-25 20:13:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:13:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) Word has length 5 [2021-11-25 20:13:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:40,992 INFO L225 Difference]: With dead ends: 30 [2021-11-25 20:13:40,993 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 20:13:40,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:13:40,994 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:40,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 30 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 20:13:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 11. [2021-11-25 20:13:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 20:13:41,002 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-11-25 20:13:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:41,002 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 20:13:41,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 20:13:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 20:13:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:13:41,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:41,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:13:41,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:41,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:41,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1602123832, now seen corresponding path program 1 times [2021-11-25 20:13:41,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382706945] [2021-11-25 20:13:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:41,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:41,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382706945] [2021-11-25 20:13:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382706945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:41,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:41,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:13:41,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86428842] [2021-11-25 20:13:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:41,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:13:41,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:13:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:13:41,326 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 20:13:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:41,431 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-25 20:13:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:13:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:13:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:41,434 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:13:41,434 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 20:13:41,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:13:41,435 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:41,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 20:13:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-11-25 20:13:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:13:41,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2021-11-25 20:13:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:41,439 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:13:41,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 20:13:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:13:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:13:41,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:41,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:41,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:13:41,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1873767508, now seen corresponding path program 1 times [2021-11-25 20:13:41,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:41,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926587079] [2021-11-25 20:13:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:41,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:41,482 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 20:13:41,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:41,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926587079] [2021-11-25 20:13:41,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926587079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:41,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:41,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:41,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687536675] [2021-11-25 20:13:41,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:41,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:13:41,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:41,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:13:41,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:13:41,485 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 20:13:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:41,496 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-11-25 20:13:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:13:41,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-25 20:13:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:41,497 INFO L225 Difference]: With dead ends: 14 [2021-11-25 20:13:41,497 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 20:13:41,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:13:41,498 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:41,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:13:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 20:13:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 20:13:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 20:13:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 20:13:41,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-25 20:13:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:41,501 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 20:13:41,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 20:13:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 20:13:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:13:41,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:41,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:41,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:13:41,503 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 937389987, now seen corresponding path program 1 times [2021-11-25 20:13:41,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38744145] [2021-11-25 20:13:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:41,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:41,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38744145] [2021-11-25 20:13:41,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38744145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190175077] [2021-11-25 20:13:41,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:41,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:41,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:41,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:13:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:13:41,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:41,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:41,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190175077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607033572] [2021-11-25 20:13:41,941 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:41,941 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:41,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:41,941 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:41,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:41,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:42,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:13:42,089 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 14 treesize of output 10 [2021-11-25 20:13:42,146 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 14 treesize of output 10 [2021-11-25 20:13:42,248 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:42,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '407#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:42,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:42,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:42,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2021-11-25 20:13:42,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469667059] [2021-11-25 20:13:42,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:42,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 20:13:42,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 20:13:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:13:42,630 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 20:13:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:42,803 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-25 20:13:42,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:13:42,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 20:13:42,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:42,804 INFO L225 Difference]: With dead ends: 13 [2021-11-25 20:13:42,804 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 20:13:42,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:13:42,806 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:42,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 20:13:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2021-11-25 20:13:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 20:13:42,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-11-25 20:13:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:42,809 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 20:13:42,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 20:13:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 20:13:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:13:42,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:42,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:42,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:43,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:43,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1111355236, now seen corresponding path program 2 times [2021-11-25 20:13:43,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:43,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808563693] [2021-11-25 20:13:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:43,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:43,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:43,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808563693] [2021-11-25 20:13:43,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808563693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:43,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4640846] [2021-11-25 20:13:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:43,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:43,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:43,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:13:43,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:13:43,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 20:13:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:43,361 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 14 treesize of output 10 [2021-11-25 20:13:43,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:43,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:13:43,591 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 26 treesize of output 22 [2021-11-25 20:13:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:43,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4640846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331702843] [2021-11-25 20:13:43,771 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:43,772 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:43,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:43,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:43,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:43,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:43,828 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 14 treesize of output 10 [2021-11-25 20:13:43,872 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 14 treesize of output 10 [2021-11-25 20:13:43,915 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 14 treesize of output 10 [2021-11-25 20:13:43,985 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:44,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '521#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:44,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:44,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:44,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-11-25 20:13:44,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098925380] [2021-11-25 20:13:44,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:44,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 20:13:44,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 20:13:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:13:44,419 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 20:13:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:44,619 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-25 20:13:44,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:13:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 10 [2021-11-25 20:13:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:44,620 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:13:44,620 INFO L226 Difference]: Without dead ends: 14 [2021-11-25 20:13:44,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 20:13:44,622 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 18 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:44,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-25 20:13:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-25 20:13:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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 20:13:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 20:13:44,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-11-25 20:13:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:44,624 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 20:13:44,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 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 20:13:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 20:13:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:13:44,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:44,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 20:13:44,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:44,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:13:44,837 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:44,838 INFO L85 PathProgramCache]: Analyzing trace with hash 568496887, now seen corresponding path program 3 times [2021-11-25 20:13:44,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:44,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566973168] [2021-11-25 20:13:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:44,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:44,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566973168] [2021-11-25 20:13:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566973168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142093897] [2021-11-25 20:13:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:13:44,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:44,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:13:45,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:13:45,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 20:13:45,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:45,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:45,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142093897] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:45,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33365237] [2021-11-25 20:13:45,374 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:45,374 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:45,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:45,374 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:45,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:45,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:45,425 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 11 treesize of output 7 [2021-11-25 20:13:45,463 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 14 treesize of output 10 [2021-11-25 20:13:45,494 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 14 treesize of output 10 [2021-11-25 20:13:45,519 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 14 treesize of output 10 [2021-11-25 20:13:45,631 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:45,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '656#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:45,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:45,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:45,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2021-11-25 20:13:45,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418478280] [2021-11-25 20:13:45,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:45,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 20:13:45,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 20:13:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:13:45,995 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 20:13:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:46,148 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-25 20:13:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:13:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 20:13:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:46,150 INFO L225 Difference]: With dead ends: 16 [2021-11-25 20:13:46,150 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:13:46,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:13:46,152 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:46,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:13:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-25 20:13:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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 20:13:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-25 20:13:46,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-11-25 20:13:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:46,158 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-25 20:13:46,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 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 20:13:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-25 20:13:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:13:46,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:46,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 20:13:46,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:46,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:13:46,385 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 864661232, now seen corresponding path program 4 times [2021-11-25 20:13:46,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:46,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293576844] [2021-11-25 20:13:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:46,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:46,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293576844] [2021-11-25 20:13:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293576844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973906379] [2021-11-25 20:13:46,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:46,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:46,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:46,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:13:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-25 20:13:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:46,704 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 14 treesize of output 10 [2021-11-25 20:13:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:46,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:13:46,842 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 26 treesize of output 22 [2021-11-25 20:13:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973906379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131099411] [2021-11-25 20:13:46,956 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:46,956 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:46,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:46,956 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:46,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:46,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:47,016 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 14 treesize of output 10 [2021-11-25 20:13:47,057 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 14 treesize of output 10 [2021-11-25 20:13:47,088 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 14 treesize of output 10 [2021-11-25 20:13:47,152 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:47,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '801#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:47,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:47,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:47,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-25 20:13:47,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304401702] [2021-11-25 20:13:47,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:47,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 20:13:47,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:47,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 20:13:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-25 20:13:47,573 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:47,773 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-25 20:13:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:13:47,774 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 20:13:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:47,774 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:13:47,774 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 20:13:47,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 20:13:47,775 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:47,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2021-11-25 20:13:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 20:13:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-25 20:13:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-25 20:13:47,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-11-25 20:13:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:47,778 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-25 20:13:47,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-25 20:13:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:13:47,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:47,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2021-11-25 20:13:47,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:47,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:47,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1264874549, now seen corresponding path program 5 times [2021-11-25 20:13:47,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587494662] [2021-11-25 20:13:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:47,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:48,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587494662] [2021-11-25 20:13:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587494662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:48,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654851066] [2021-11-25 20:13:48,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:48,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:48,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:48,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:48,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:13:48,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:13:48,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 20:13:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:48,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:48,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:48,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654851066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52421711] [2021-11-25 20:13:48,782 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:48,782 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:48,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:48,782 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:48,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:48,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:48,828 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 11 treesize of output 7 [2021-11-25 20:13:48,868 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 14 treesize of output 10 [2021-11-25 20:13:48,893 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 14 treesize of output 10 [2021-11-25 20:13:48,912 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 14 treesize of output 10 [2021-11-25 20:13:49,022 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:49,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '981#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:49,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:49,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:49,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2021-11-25 20:13:49,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769362466] [2021-11-25 20:13:49,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:49,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 20:13:49,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 20:13:49,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 20:13:49,352 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 20:13:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:49,577 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 20:13:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:13:49,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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) Word has length 16 [2021-11-25 20:13:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:49,578 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:13:49,578 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 20:13:49,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 20:13:49,580 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:49,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 20:13:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-25 20:13:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 20:13:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 20:13:49,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2021-11-25 20:13:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:49,583 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 20:13:49,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 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 20:13:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 20:13:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:13:49,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:49,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 20:13:49,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:49,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:49,797 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash -68697404, now seen corresponding path program 6 times [2021-11-25 20:13:49,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528974997] [2021-11-25 20:13:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:49,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:49,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528974997] [2021-11-25 20:13:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528974997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595164708] [2021-11-25 20:13:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:13:49,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:49,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:49,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:13:50,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:13:50,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:13:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:50,156 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 14 treesize of output 10 [2021-11-25 20:13:50,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:50,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:50,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:13:50,285 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 26 treesize of output 22 [2021-11-25 20:13:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:50,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595164708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:50,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707571530] [2021-11-25 20:13:50,391 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:50,391 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:50,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:50,392 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:50,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:50,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:50,440 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 11 treesize of output 7 [2021-11-25 20:13:50,475 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 14 treesize of output 10 [2021-11-25 20:13:50,514 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 14 treesize of output 10 [2021-11-25 20:13:50,533 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 14 treesize of output 10 [2021-11-25 20:13:50,635 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:50,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1163#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:50,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:50,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:50,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-11-25 20:13:50,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394446417] [2021-11-25 20:13:50,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:50,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 20:13:50,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 20:13:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:13:50,941 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 20:13:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:51,249 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-25 20:13:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:13:51,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 18 [2021-11-25 20:13:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:51,250 INFO L225 Difference]: With dead ends: 31 [2021-11-25 20:13:51,250 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 20:13:51,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:13:51,251 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:51,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 20:13:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-25 20:13:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 20:13:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-25 20:13:51,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2021-11-25 20:13:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:51,254 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-25 20:13:51,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 20:13:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-25 20:13:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 20:13:51,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:51,255 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2021-11-25 20:13:51,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:51,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:13:51,465 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1262896609, now seen corresponding path program 7 times [2021-11-25 20:13:51,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:51,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574010780] [2021-11-25 20:13:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:51,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:51,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:51,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574010780] [2021-11-25 20:13:51,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574010780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082320013] [2021-11-25 20:13:51,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:51,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:51,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:51,615 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:51,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:13:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 20:13:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:51,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:51,990 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 5 treesize of output 3 [2021-11-25 20:13:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:52,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082320013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486959105] [2021-11-25 20:13:52,029 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:52,030 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:52,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:52,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:52,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:52,091 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 11 treesize of output 7 [2021-11-25 20:13:52,133 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 14 treesize of output 10 [2021-11-25 20:13:52,161 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 14 treesize of output 10 [2021-11-25 20:13:52,197 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 14 treesize of output 10 [2021-11-25 20:13:52,283 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:52,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1378#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:52,579 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:52,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:52,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2021-11-25 20:13:52,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231309099] [2021-11-25 20:13:52,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:52,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:13:52,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:13:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-11-25 20:13:52,580 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 20:13:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:52,847 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-25 20:13:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:13:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 20:13:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:52,848 INFO L225 Difference]: With dead ends: 24 [2021-11-25 20:13:52,849 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 20:13:52,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:13:52,850 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:52,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 20:13:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-25 20:13:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 20:13:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-25 20:13:52,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-11-25 20:13:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:52,853 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-25 20:13:52,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 20:13:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-25 20:13:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:13:52,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:52,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2021-11-25 20:13:52,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:53,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:13:53,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:53,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1832102936, now seen corresponding path program 8 times [2021-11-25 20:13:53,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701255148] [2021-11-25 20:13:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:53,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:53,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:53,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701255148] [2021-11-25 20:13:53,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701255148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:53,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165112279] [2021-11-25 20:13:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:53,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:53,264 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:53,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:13:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:13:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:53,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:13:53,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:53,477 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 14 treesize of output 10 [2021-11-25 20:13:53,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:53,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:13:53,604 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 26 treesize of output 22 [2021-11-25 20:13:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165112279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:53,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231675149] [2021-11-25 20:13:53,715 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:53,715 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:53,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:53,715 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:53,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:53,761 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 11 treesize of output 7 [2021-11-25 20:13:53,800 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 14 treesize of output 10 [2021-11-25 20:13:53,822 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 14 treesize of output 10 [2021-11-25 20:13:53,845 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 14 treesize of output 10 [2021-11-25 20:13:53,957 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:54,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1597#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:54,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:54,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:54,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2021-11-25 20:13:54,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672070930] [2021-11-25 20:13:54,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:54,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:13:54,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:13:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-11-25 20:13:54,264 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 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 20:13:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:54,623 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-25 20:13:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:13:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 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 22 [2021-11-25 20:13:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:54,625 INFO L225 Difference]: With dead ends: 37 [2021-11-25 20:13:54,625 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 20:13:54,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 20:13:54,626 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:54,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:13:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 20:13:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-25 20:13:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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 20:13:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-25 20:13:54,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2021-11-25 20:13:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:54,630 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-25 20:13:54,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 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 20:13:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-25 20:13:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:13:54,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:54,631 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2021-11-25 20:13:54,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:54,853 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -214663693, now seen corresponding path program 9 times [2021-11-25 20:13:54,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:54,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762900912] [2021-11-25 20:13:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:54,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:55,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:55,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762900912] [2021-11-25 20:13:55,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762900912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:55,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835696742] [2021-11-25 20:13:55,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:13:55,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:55,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:55,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:13:55,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:13:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 20:13:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:55,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835696742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766519329] [2021-11-25 20:13:55,935 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:55,935 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:55,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:55,935 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:55,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:55,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:55,983 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 14 treesize of output 10 [2021-11-25 20:13:56,027 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 14 treesize of output 10 [2021-11-25 20:13:56,059 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 14 treesize of output 10 [2021-11-25 20:13:56,130 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:56,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1864#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:56,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:56,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:56,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2021-11-25 20:13:56,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746191197] [2021-11-25 20:13:56,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:56,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 20:13:56,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 20:13:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1746, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 20:13:56,580 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 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 20:13:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:56,888 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-25 20:13:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:13:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 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 24 [2021-11-25 20:13:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:56,889 INFO L225 Difference]: With dead ends: 28 [2021-11-25 20:13:56,889 INFO L226 Difference]: Without dead ends: 28 [2021-11-25 20:13:56,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 20:13:56,891 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:56,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:13:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-25 20:13:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-25 20:13:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 20:13:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-25 20:13:56,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2021-11-25 20:13:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-25 20:13:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.894736842105263) internal successors, (72), 38 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 20:13:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-25 20:13:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:13:56,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:56,896 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2021-11-25 20:13:56,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:57,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:13:57,096 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -133379348, now seen corresponding path program 10 times [2021-11-25 20:13:57,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:57,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065665931] [2021-11-25 20:13:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:57,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:57,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065665931] [2021-11-25 20:13:57,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065665931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22170397] [2021-11-25 20:13:57,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:13:57,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:57,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:57,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:13:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 20:13:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:57,571 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 14 treesize of output 10 [2021-11-25 20:13:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:13:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:57,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:13:57,720 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 26 treesize of output 22 [2021-11-25 20:13:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:57,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22170397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:57,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112575652] [2021-11-25 20:13:57,831 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:57,831 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:57,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:57,831 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:57,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:57,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:57,883 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 14 treesize of output 10 [2021-11-25 20:13:57,915 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 14 treesize of output 10 [2021-11-25 20:13:57,955 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 14 treesize of output 10 [2021-11-25 20:13:58,013 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:13:58,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2120#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:13:58,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:13:58,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:13:58,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2021-11-25 20:13:58,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346179147] [2021-11-25 20:13:58,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:13:58,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 20:13:58,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 20:13:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 20:13:58,404 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 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 20:13:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:58,851 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-25 20:13:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 20:13:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 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 26 [2021-11-25 20:13:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:58,854 INFO L225 Difference]: With dead ends: 43 [2021-11-25 20:13:58,854 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 20:13:58,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 20:13:58,855 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 28 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:58,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:13:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 20:13:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-25 20:13:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-25 20:13:58,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2021-11-25 20:13:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:58,858 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-25 20:13:58,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 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 20:13:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-25 20:13:58,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:13:58,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:58,859 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2021-11-25 20:13:58,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:13:59,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:13:59,065 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:13:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:59,066 INFO L85 PathProgramCache]: Analyzing trace with hash 189478727, now seen corresponding path program 11 times [2021-11-25 20:13:59,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:59,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396084611] [2021-11-25 20:13:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:59,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:59,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396084611] [2021-11-25 20:13:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396084611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:13:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104466331] [2021-11-25 20:13:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:13:59,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:13:59,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:13:59,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:13:59,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:13:59,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 20:13:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:13:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-25 20:13:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:13:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:59,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:13:59,878 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 7 treesize of output 5 [2021-11-25 20:13:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:59,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104466331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:13:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562869677] [2021-11-25 20:13:59,929 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:13:59,929 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:13:59,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:13:59,930 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:13:59,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:13:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:13:59,964 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 14 treesize of output 10 [2021-11-25 20:13:59,992 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 14 treesize of output 10 [2021-11-25 20:14:00,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:14:00,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:00,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2425#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:00,498 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:00,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:00,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2021-11-25 20:14:00,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203567404] [2021-11-25 20:14:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:00,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-25 20:14:00,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-25 20:14:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 20:14:00,500 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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 20:14:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:00,822 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-25 20:14:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:14:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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 28 [2021-11-25 20:14:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:00,823 INFO L225 Difference]: With dead ends: 32 [2021-11-25 20:14:00,823 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 20:14:00,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 20:14:00,825 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:00,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:14:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 20:14:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-25 20:14:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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 20:14:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-25 20:14:00,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2021-11-25 20:14:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:00,828 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-25 20:14:00,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 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 20:14:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-25 20:14:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 20:14:00,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:00,830 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2021-11-25 20:14:00,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:01,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:01,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429632, now seen corresponding path program 12 times [2021-11-25 20:14:01,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022642318] [2021-11-25 20:14:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:01,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:01,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022642318] [2021-11-25 20:14:01,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022642318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148951141] [2021-11-25 20:14:01,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:01,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:01,313 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:01,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:14:01,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:01,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 20:14:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:01,637 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 14 treesize of output 10 [2021-11-25 20:14:01,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:01,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:01,815 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 26 treesize of output 22 [2021-11-25 20:14:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148951141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218637420] [2021-11-25 20:14:01,963 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:01,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:01,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:01,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:01,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:02,003 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 11 treesize of output 7 [2021-11-25 20:14:02,031 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 14 treesize of output 10 [2021-11-25 20:14:02,057 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 14 treesize of output 10 [2021-11-25 20:14:02,070 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 14 treesize of output 10 [2021-11-25 20:14:02,182 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:02,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2718#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:02,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:02,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:02,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2021-11-25 20:14:02,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996913962] [2021-11-25 20:14:02,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:02,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 20:14:02,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 20:14:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:14:02,569 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:14:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:03,169 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-25 20:14:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:14:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-25 20:14:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:03,170 INFO L225 Difference]: With dead ends: 49 [2021-11-25 20:14:03,170 INFO L226 Difference]: Without dead ends: 34 [2021-11-25 20:14:03,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 20:14:03,172 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:03,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 16 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 572 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2021-11-25 20:14:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-25 20:14:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-25 20:14:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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 20:14:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-25 20:14:03,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-11-25 20:14:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:03,175 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-25 20:14:03,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:14:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-25 20:14:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:14:03,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:03,177 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2021-11-25 20:14:03,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:03,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:03,381 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1601878501, now seen corresponding path program 13 times [2021-11-25 20:14:03,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036036648] [2021-11-25 20:14:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:03,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:03,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036036648] [2021-11-25 20:14:03,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036036648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:03,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828338596] [2021-11-25 20:14:03,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:03,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:03,677 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:03,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:14:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:03,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 20:14:03,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:03,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:04,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828338596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:04,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397379710] [2021-11-25 20:14:04,973 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:04,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:04,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:04,974 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:04,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:04,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:05,016 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 11 treesize of output 7 [2021-11-25 20:14:05,047 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 14 treesize of output 10 [2021-11-25 20:14:05,074 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 14 treesize of output 10 [2021-11-25 20:14:05,097 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 14 treesize of output 10 [2021-11-25 20:14:05,190 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:05,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3073#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:05,601 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:05,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:05,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2021-11-25 20:14:05,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556691817] [2021-11-25 20:14:05,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:05,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-25 20:14:05,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:05,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-25 20:14:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:14:05,603 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 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 20:14:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:06,022 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-25 20:14:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 20:14:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 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 32 [2021-11-25 20:14:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:06,023 INFO L225 Difference]: With dead ends: 36 [2021-11-25 20:14:06,023 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 20:14:06,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=687, Invalid=3735, Unknown=0, NotChecked=0, Total=4422 [2021-11-25 20:14:06,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:06,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:14:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 20:14:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-25 20:14:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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 20:14:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-25 20:14:06,028 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-11-25 20:14:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:06,028 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-25 20:14:06,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 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 20:14:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-25 20:14:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:14:06,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:06,029 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2021-11-25 20:14:06,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:06,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:14:06,241 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1806948076, now seen corresponding path program 14 times [2021-11-25 20:14:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208278755] [2021-11-25 20:14:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:06,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:06,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:06,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208278755] [2021-11-25 20:14:06,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208278755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:06,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256839436] [2021-11-25 20:14:06,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:06,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:06,584 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:06,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:14:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-25 20:14:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 20:14:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:06,955 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 14 treesize of output 10 [2021-11-25 20:14:07,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:07,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:07,136 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 26 treesize of output 22 [2021-11-25 20:14:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:07,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256839436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297817611] [2021-11-25 20:14:07,287 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:07,287 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:07,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:07,288 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:07,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:07,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:07,328 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 14 treesize of output 10 [2021-11-25 20:14:07,356 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 14 treesize of output 10 [2021-11-25 20:14:07,385 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 14 treesize of output 10 [2021-11-25 20:14:07,445 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:07,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3403#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:07,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:07,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:07,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2021-11-25 20:14:07,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295007056] [2021-11-25 20:14:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:07,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 20:14:07,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 20:14:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 20:14:07,885 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 20:14:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:08,613 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-25 20:14:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:14:08,615 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 34 [2021-11-25 20:14:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:08,615 INFO L225 Difference]: With dead ends: 55 [2021-11-25 20:14:08,616 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 20:14:08,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 20:14:08,617 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:08,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 20 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 740 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2021-11-25 20:14:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 20:14:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-25 20:14:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 20:14:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-25 20:14:08,620 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2021-11-25 20:14:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:08,620 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-25 20:14:08,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 20:14:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-25 20:14:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 20:14:08,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:08,621 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1] [2021-11-25 20:14:08,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:08,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:08,838 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 481430127, now seen corresponding path program 15 times [2021-11-25 20:14:08,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:08,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921107548] [2021-11-25 20:14:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:08,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:09,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:09,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921107548] [2021-11-25 20:14:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921107548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:09,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956962016] [2021-11-25 20:14:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:09,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:09,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:09,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:14:09,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 20:14:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:09,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:10,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956962016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473624164] [2021-11-25 20:14:10,555 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:10,555 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:10,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:10,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:10,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:10,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:10,589 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 11 treesize of output 7 [2021-11-25 20:14:10,612 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 14 treesize of output 10 [2021-11-25 20:14:10,645 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 14 treesize of output 10 [2021-11-25 20:14:10,662 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 14 treesize of output 10 [2021-11-25 20:14:10,741 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:11,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3802#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:11,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:11,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:11,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 55 [2021-11-25 20:14:11,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889409867] [2021-11-25 20:14:11,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:11,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-25 20:14:11,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-25 20:14:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=3462, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 20:14:11,139 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 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 20:14:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:11,605 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-25 20:14:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 20:14:11,605 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 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 36 [2021-11-25 20:14:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:11,606 INFO L225 Difference]: With dead ends: 40 [2021-11-25 20:14:11,606 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 20:14:11,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=836, Invalid=4566, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 20:14:11,608 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:11,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:14:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 20:14:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-25 20:14:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 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 20:14:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-25 20:14:11,611 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-11-25 20:14:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:11,612 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-25 20:14:11,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 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 20:14:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-25 20:14:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 20:14:11,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:11,613 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2021-11-25 20:14:11,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:11,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:11,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1202116504, now seen corresponding path program 16 times [2021-11-25 20:14:11,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260376806] [2021-11-25 20:14:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:11,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:12,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260376806] [2021-11-25 20:14:12,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260376806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:12,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947734431] [2021-11-25 20:14:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:12,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:12,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:14:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 20:14:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:12,563 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 14 treesize of output 10 [2021-11-25 20:14:12,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:12,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:12,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:12,741 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 26 treesize of output 22 [2021-11-25 20:14:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:12,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947734431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:12,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026427076] [2021-11-25 20:14:12,893 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:12,893 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:12,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:12,894 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:12,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:12,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:12,940 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 11 treesize of output 7 [2021-11-25 20:14:12,979 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 14 treesize of output 10 [2021-11-25 20:14:13,007 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 14 treesize of output 10 [2021-11-25 20:14:13,022 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 14 treesize of output 10 [2021-11-25 20:14:13,089 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:13,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4169#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:13,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:13,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2021-11-25 20:14:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389529132] [2021-11-25 20:14:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:13,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 20:14:13,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 20:14:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1770, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 20:14:13,501 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 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 20:14:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:14,359 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-25 20:14:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 20:14:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 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 38 [2021-11-25 20:14:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:14,360 INFO L225 Difference]: With dead ends: 61 [2021-11-25 20:14:14,360 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 20:14:14,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 20:14:14,362 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:14,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 25 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:14:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 20:14:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-25 20:14:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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 20:14:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-25 20:14:14,365 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-11-25 20:14:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:14,365 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-25 20:14:14,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 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 20:14:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-25 20:14:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:14:14,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:14,370 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1] [2021-11-25 20:14:14,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:14,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 20:14:14,585 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -303504317, now seen corresponding path program 17 times [2021-11-25 20:14:14,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253011077] [2021-11-25 20:14:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:14,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:14,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253011077] [2021-11-25 20:14:14,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253011077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9064994] [2021-11-25 20:14:14,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:14,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:14,906 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:14,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 20:14:15,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-25 20:14:15,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:15,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 20:14:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:15,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:15,836 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 7 treesize of output 5 [2021-11-25 20:14:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9064994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218993141] [2021-11-25 20:14:15,887 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:15,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:15,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:15,887 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:15,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:15,928 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 11 treesize of output 7 [2021-11-25 20:14:15,968 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 14 treesize of output 10 [2021-11-25 20:14:15,995 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 14 treesize of output 10 [2021-11-25 20:14:16,013 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 14 treesize of output 10 [2021-11-25 20:14:16,100 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:16,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4603#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:16,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:16,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:16,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2021-11-25 20:14:16,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085836679] [2021-11-25 20:14:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:16,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-25 20:14:16,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-25 20:14:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=3048, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 20:14:16,458 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 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 20:14:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:16,949 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-25 20:14:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:14:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 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 40 [2021-11-25 20:14:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:16,950 INFO L225 Difference]: With dead ends: 44 [2021-11-25 20:14:16,950 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 20:14:16,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=4209, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 20:14:16,951 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:16,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:14:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 20:14:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-25 20:14:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 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 20:14:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-25 20:14:16,955 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-11-25 20:14:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:16,955 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-25 20:14:16,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 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 20:14:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-25 20:14:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 20:14:16,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:16,956 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2021-11-25 20:14:16,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:17,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 20:14:17,165 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 390126908, now seen corresponding path program 18 times [2021-11-25 20:14:17,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:17,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966923906] [2021-11-25 20:14:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:17,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:17,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966923906] [2021-11-25 20:14:17,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966923906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254682823] [2021-11-25 20:14:17,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:17,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:17,553 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:17,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 20:14:17,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 20:14:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:17,966 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 14 treesize of output 10 [2021-11-25 20:14:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:18,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:18,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:18,154 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 26 treesize of output 22 [2021-11-25 20:14:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:18,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254682823] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40814149] [2021-11-25 20:14:18,306 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:18,306 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:18,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:18,306 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:18,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:18,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:18,354 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 14 treesize of output 10 [2021-11-25 20:14:18,390 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 14 treesize of output 10 [2021-11-25 20:14:18,417 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 14 treesize of output 10 [2021-11-25 20:14:18,463 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:18,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5007#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:18,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:18,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:18,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2021-11-25 20:14:18,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803853454] [2021-11-25 20:14:18,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:18,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 20:14:18,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 20:14:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 20:14:18,928 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 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 20:14:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:19,940 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-25 20:14:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 20:14:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 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 42 [2021-11-25 20:14:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:19,941 INFO L225 Difference]: With dead ends: 67 [2021-11-25 20:14:19,941 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 20:14:19,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=301, Invalid=4255, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 20:14:19,942 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:19,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 19 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1001 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2021-11-25 20:14:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 20:14:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-25 20:14:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 20:14:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-25 20:14:19,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2021-11-25 20:14:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:19,945 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-25 20:14:19,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 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 20:14:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-25 20:14:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 20:14:19,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:19,946 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2021-11-25 20:14:19,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-25 20:14:20,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 20:14:20,153 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1149842327, now seen corresponding path program 19 times [2021-11-25 20:14:20,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:20,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115816137] [2021-11-25 20:14:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:20,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:20,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115816137] [2021-11-25 20:14:20,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115816137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408868797] [2021-11-25 20:14:20,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:20,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:20,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:20,516 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:20,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 20:14:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:20,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 20:14:20,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:20,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:21,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:22,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408868797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11531544] [2021-11-25 20:14:22,296 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:22,296 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:22,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:22,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:22,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:22,350 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 14 treesize of output 10 [2021-11-25 20:14:22,381 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 14 treesize of output 10 [2021-11-25 20:14:22,408 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 14 treesize of output 10 [2021-11-25 20:14:22,469 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:22,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5494#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:22,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:22,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:22,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 67 [2021-11-25 20:14:22,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678313184] [2021-11-25 20:14:22,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:22,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-25 20:14:22,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-25 20:14:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=4926, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 20:14:22,981 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 69 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 68 states have internal predecessors, (132), 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 20:14:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:23,577 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-25 20:14:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:14:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 68 states have internal predecessors, (132), 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 44 [2021-11-25 20:14:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:23,579 INFO L225 Difference]: With dead ends: 48 [2021-11-25 20:14:23,579 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 20:14:23,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1179, Invalid=6477, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 20:14:23,580 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:23,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:14:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 20:14:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-25 20:14:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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 20:14:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-11-25 20:14:23,583 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2021-11-25 20:14:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:23,583 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-11-25 20:14:23,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 68 states have internal predecessors, (132), 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 20:14:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-11-25 20:14:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 20:14:23,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:23,584 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2021-11-25 20:14:23,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:23,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:23,793 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1191880592, now seen corresponding path program 20 times [2021-11-25 20:14:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:23,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203726225] [2021-11-25 20:14:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:23,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:24,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203726225] [2021-11-25 20:14:24,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203726225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:24,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435002583] [2021-11-25 20:14:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:24,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:24,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:24,235 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:24,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 20:14:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 20:14:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-25 20:14:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:24,743 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 14 treesize of output 10 [2021-11-25 20:14:24,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:24,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:24,966 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 26 treesize of output 22 [2021-11-25 20:14:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:25,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435002583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251727017] [2021-11-25 20:14:25,144 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:25,145 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:25,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:25,145 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:25,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:25,185 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 14 treesize of output 10 [2021-11-25 20:14:25,213 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 14 treesize of output 10 [2021-11-25 20:14:25,242 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 14 treesize of output 10 [2021-11-25 20:14:25,299 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:25,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5935#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:25,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:25,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:25,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2021-11-25 20:14:25,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348366752] [2021-11-25 20:14:25,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:25,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-25 20:14:25,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-25 20:14:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2314, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:14:25,777 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 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 20:14:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:26,840 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-11-25 20:14:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 20:14:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 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 46 [2021-11-25 20:14:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:26,841 INFO L225 Difference]: With dead ends: 73 [2021-11-25 20:14:26,841 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 20:14:26,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=323, Invalid=4933, Unknown=0, NotChecked=0, Total=5256 [2021-11-25 20:14:26,842 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:14:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 20:14:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-25 20:14:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 20:14:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-25 20:14:26,844 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2021-11-25 20:14:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:26,845 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-25 20:14:26,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 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 20:14:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-25 20:14:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 20:14:26,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:26,846 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1] [2021-11-25 20:14:26,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:27,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 20:14:27,069 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:27,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1362778219, now seen corresponding path program 21 times [2021-11-25 20:14:27,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982310807] [2021-11-25 20:14:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:27,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 81 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:27,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982310807] [2021-11-25 20:14:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982310807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943851412] [2021-11-25 20:14:27,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:27,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:27,483 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:27,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 20:14:27,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:27,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-25 20:14:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:27,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:28,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943851412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:29,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054279033] [2021-11-25 20:14:29,466 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:29,466 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:29,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:29,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:29,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:29,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:29,499 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 11 treesize of output 7 [2021-11-25 20:14:29,522 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 14 treesize of output 10 [2021-11-25 20:14:29,546 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 14 treesize of output 10 [2021-11-25 20:14:29,562 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 14 treesize of output 10 [2021-11-25 20:14:29,636 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:30,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6466#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:30,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:30,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:30,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 73 [2021-11-25 20:14:30,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904237208] [2021-11-25 20:14:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:30,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-25 20:14:30,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-25 20:14:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=5754, Unknown=0, NotChecked=0, Total=6480 [2021-11-25 20:14:30,098 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 75 states, 74 states have (on average 1.945945945945946) internal successors, (144), 74 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 20:14:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:30,795 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-25 20:14:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 20:14:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.945945945945946) internal successors, (144), 74 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) Word has length 48 [2021-11-25 20:14:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:30,796 INFO L225 Difference]: With dead ends: 52 [2021-11-25 20:14:30,796 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 20:14:30,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1373, Invalid=7557, Unknown=0, NotChecked=0, Total=8930 [2021-11-25 20:14:30,798 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:30,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:14:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 20:14:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-25 20:14:30,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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 20:14:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-25 20:14:30,801 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2021-11-25 20:14:30,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:30,801 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-25 20:14:30,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.945945945945946) internal successors, (144), 74 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 20:14:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-25 20:14:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:14:30,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:30,802 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2021-11-25 20:14:30,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:31,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 20:14:31,025 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash -335157404, now seen corresponding path program 22 times [2021-11-25 20:14:31,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063103643] [2021-11-25 20:14:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:31,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:31,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063103643] [2021-11-25 20:14:31,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063103643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:31,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917968961] [2021-11-25 20:14:31,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:31,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:31,498 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:31,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 20:14:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-25 20:14:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:31,968 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 14 treesize of output 10 [2021-11-25 20:14:32,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:32,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:32,233 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 26 treesize of output 22 [2021-11-25 20:14:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:32,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917968961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348502155] [2021-11-25 20:14:32,405 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:32,405 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:32,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:32,406 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:32,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:32,439 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 14 treesize of output 10 [2021-11-25 20:14:32,472 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 14 treesize of output 10 [2021-11-25 20:14:32,494 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 14 treesize of output 10 [2021-11-25 20:14:32,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:33,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6944#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:33,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:33,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:33,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2021-11-25 20:14:33,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006249597] [2021-11-25 20:14:33,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:33,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 20:14:33,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 20:14:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 20:14:33,046 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 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 20:14:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:34,296 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-11-25 20:14:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 20:14:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 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) Word has length 50 [2021-11-25 20:14:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:34,297 INFO L225 Difference]: With dead ends: 79 [2021-11-25 20:14:34,297 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 20:14:34,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=345, Invalid=5661, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 20:14:34,298 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:34,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:14:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 20:14:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-25 20:14:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:14:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-25 20:14:34,301 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2021-11-25 20:14:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:34,302 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-25 20:14:34,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 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 20:14:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-25 20:14:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 20:14:34,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:34,303 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1] [2021-11-25 20:14:34,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:34,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:34,517 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash 49001151, now seen corresponding path program 23 times [2021-11-25 20:14:34,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778880402] [2021-11-25 20:14:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:34,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:35,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:35,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778880402] [2021-11-25 20:14:35,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778880402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:35,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484740857] [2021-11-25 20:14:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:35,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:35,089 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:35,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 20:14:35,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 20:14:35,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-25 20:14:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:36,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:37,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484740857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879006043] [2021-11-25 20:14:37,464 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:37,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:37,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:37,464 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:37,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:37,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:37,497 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 14 treesize of output 10 [2021-11-25 20:14:37,522 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 14 treesize of output 10 [2021-11-25 20:14:37,550 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 14 treesize of output 10 [2021-11-25 20:14:37,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:38,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7520#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:38,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:38,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:38,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 80 [2021-11-25 20:14:38,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193036744] [2021-11-25 20:14:38,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:38,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-25 20:14:38,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-25 20:14:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=6671, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 20:14:38,116 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 82 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 81 states have internal predecessors, (156), 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 20:14:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:38,936 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-25 20:14:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 20:14:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 81 states have internal predecessors, (156), 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 52 [2021-11-25 20:14:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:38,937 INFO L225 Difference]: With dead ends: 56 [2021-11-25 20:14:38,937 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 20:14:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1831, Invalid=8675, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 20:14:38,938 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:38,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:14:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 20:14:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-25 20:14:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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 20:14:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-11-25 20:14:38,940 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2021-11-25 20:14:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-11-25 20:14:38,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.9259259259259258) internal successors, (156), 81 states have internal predecessors, (156), 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 20:14:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-11-25 20:14:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 20:14:38,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:38,942 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2021-11-25 20:14:38,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:39,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 20:14:39,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -154534728, now seen corresponding path program 24 times [2021-11-25 20:14:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304011062] [2021-11-25 20:14:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:39,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:39,796 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304011062] [2021-11-25 20:14:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304011062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94120579] [2021-11-25 20:14:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:39,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:39,801 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 20:14:40,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:40,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-25 20:14:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:40,451 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 14 treesize of output 10 [2021-11-25 20:14:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:40,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:40,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:40,664 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 26 treesize of output 22 [2021-11-25 20:14:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94120579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724426943] [2021-11-25 20:14:40,846 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:40,846 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:40,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:40,846 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:40,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:40,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:40,893 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 14 treesize of output 10 [2021-11-25 20:14:40,921 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 14 treesize of output 10 [2021-11-25 20:14:40,961 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 14 treesize of output 10 [2021-11-25 20:14:41,003 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:41,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8035#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:41,518 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:41,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:41,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2021-11-25 20:14:41,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272810852] [2021-11-25 20:14:41,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:41,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 20:14:41,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 20:14:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 20:14:41,521 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 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 20:14:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:42,925 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-11-25 20:14:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-25 20:14:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 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 54 [2021-11-25 20:14:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:42,926 INFO L225 Difference]: With dead ends: 85 [2021-11-25 20:14:42,926 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 20:14:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=367, Invalid=6439, Unknown=0, NotChecked=0, Total=6806 [2021-11-25 20:14:42,927 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:42,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 26 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:14:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 20:14:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-25 20:14:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 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 20:14:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-25 20:14:42,937 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2021-11-25 20:14:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:42,938 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-25 20:14:42,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 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 20:14:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-25 20:14:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:14:42,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:42,939 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1] [2021-11-25 20:14:42,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:43,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-25 20:14:43,139 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1154785939, now seen corresponding path program 25 times [2021-11-25 20:14:43,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:43,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454988729] [2021-11-25 20:14:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:43,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 121 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:43,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454988729] [2021-11-25 20:14:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454988729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320386947] [2021-11-25 20:14:43,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:43,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:43,641 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:43,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 20:14:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-25 20:14:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:43,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:44,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:46,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320386947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:46,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372561287] [2021-11-25 20:14:46,057 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:46,057 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:46,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:46,057 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:46,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:46,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:46,098 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 14 treesize of output 10 [2021-11-25 20:14:46,135 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 14 treesize of output 10 [2021-11-25 20:14:46,155 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 14 treesize of output 10 [2021-11-25 20:14:46,220 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:46,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8654#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:46,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:46,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:46,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 85 [2021-11-25 20:14:46,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870134958] [2021-11-25 20:14:46,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:46,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-25 20:14:46,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:46,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-25 20:14:46,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=7602, Unknown=0, NotChecked=0, Total=8556 [2021-11-25 20:14:46,806 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 87 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 86 states have internal predecessors, (168), 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 20:14:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:47,753 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-25 20:14:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-25 20:14:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 86 states have internal predecessors, (168), 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 56 [2021-11-25 20:14:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:47,754 INFO L225 Difference]: With dead ends: 60 [2021-11-25 20:14:47,754 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 20:14:47,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1806, Invalid=9966, Unknown=0, NotChecked=0, Total=11772 [2021-11-25 20:14:47,755 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:47,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:14:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 20:14:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-25 20:14:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 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 20:14:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-25 20:14:47,757 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-11-25 20:14:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-25 20:14:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.9534883720930232) internal successors, (168), 86 states have internal predecessors, (168), 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 20:14:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-25 20:14:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 20:14:47,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:47,758 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2021-11-25 20:14:47,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:47,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:47,958 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1647724428, now seen corresponding path program 26 times [2021-11-25 20:14:47,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:47,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399713592] [2021-11-25 20:14:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:47,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:48,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399713592] [2021-11-25 20:14:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399713592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917392344] [2021-11-25 20:14:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:14:48,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:48,614 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:48,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 20:14:48,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-25 20:14:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-25 20:14:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:49,354 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 14 treesize of output 10 [2021-11-25 20:14:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:49,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:49,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:49,602 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 26 treesize of output 22 [2021-11-25 20:14:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:49,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917392344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972388686] [2021-11-25 20:14:49,802 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:49,802 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:49,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:49,803 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:49,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:49,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:49,846 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 11 treesize of output 7 [2021-11-25 20:14:49,868 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 14 treesize of output 10 [2021-11-25 20:14:49,894 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 14 treesize of output 10 [2021-11-25 20:14:49,909 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 14 treesize of output 10 [2021-11-25 20:14:50,009 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:50,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9206#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:50,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:50,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:50,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2021-11-25 20:14:50,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426888456] [2021-11-25 20:14:50,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:50,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-25 20:14:50,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-25 20:14:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 20:14:50,472 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 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 20:14:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:52,152 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-25 20:14:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 20:14:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 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 58 [2021-11-25 20:14:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:52,153 INFO L225 Difference]: With dead ends: 91 [2021-11-25 20:14:52,153 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 20:14:52,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=389, Invalid=7267, Unknown=0, NotChecked=0, Total=7656 [2021-11-25 20:14:52,154 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 51 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:52,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 32 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:14:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 20:14:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-25 20:14:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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 20:14:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-25 20:14:52,156 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2021-11-25 20:14:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:52,156 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-25 20:14:52,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 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 20:14:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-25 20:14:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 20:14:52,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:52,157 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1] [2021-11-25 20:14:52,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:52,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:52,357 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1133213721, now seen corresponding path program 27 times [2021-11-25 20:14:52,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:52,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036314585] [2021-11-25 20:14:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:52,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 144 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:53,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036314585] [2021-11-25 20:14:53,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036314585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524490646] [2021-11-25 20:14:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:14:53,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:53,028 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 20:14:53,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:14:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:14:53,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 20:14:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:54,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:55,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524490646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884846846] [2021-11-25 20:14:55,952 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:55,952 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:55,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:55,953 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:55,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:55,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:55,991 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 14 treesize of output 10 [2021-11-25 20:14:56,018 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 14 treesize of output 10 [2021-11-25 20:14:56,059 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 14 treesize of output 10 [2021-11-25 20:14:56,127 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:14:56,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9869#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:14:56,735 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:14:56,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:56,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 91 [2021-11-25 20:14:56,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661825188] [2021-11-25 20:14:56,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:14:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-25 20:14:56,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-25 20:14:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=8622, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 20:14:56,737 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 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 20:14:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:57,754 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-25 20:14:57,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 20:14:57,754 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 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 60 [2021-11-25 20:14:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:57,755 INFO L225 Difference]: With dead ends: 64 [2021-11-25 20:14:57,755 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 20:14:57,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4474 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2045, Invalid=11295, Unknown=0, NotChecked=0, Total=13340 [2021-11-25 20:14:57,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:14:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 20:14:57,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-25 20:14:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 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 20:14:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-11-25 20:14:57,759 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2021-11-25 20:14:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:57,759 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-11-25 20:14:57,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 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 20:14:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-11-25 20:14:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:14:57,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:57,760 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2021-11-25 20:14:57,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-25 20:14:57,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 20:14:57,981 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:14:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1903306720, now seen corresponding path program 28 times [2021-11-25 20:14:57,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:57,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974281556] [2021-11-25 20:14:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:57,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:58,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974281556] [2021-11-25 20:14:58,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974281556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:14:58,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230630157] [2021-11-25 20:14:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:14:58,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:14:58,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:14:58,791 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:14:58,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 20:14:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 20:14:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:14:59,459 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 14 treesize of output 10 [2021-11-25 20:14:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:14:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:14:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:14:59,709 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 26 treesize of output 22 [2021-11-25 20:14:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:59,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230630157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:14:59,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389852464] [2021-11-25 20:14:59,927 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:14:59,927 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:14:59,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:14:59,928 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:14:59,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:14:59,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:14:59,974 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 14 treesize of output 10 [2021-11-25 20:15:00,003 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 14 treesize of output 10 [2021-11-25 20:15:00,030 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 14 treesize of output 10 [2021-11-25 20:15:00,092 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:00,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10458#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:00,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:00,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:00,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2021-11-25 20:15:00,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104648489] [2021-11-25 20:15:00,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:00,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 20:15:00,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:00,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 20:15:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3618, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:15:00,669 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:02,455 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-11-25 20:15:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 20:15:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-25 20:15:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:02,456 INFO L225 Difference]: With dead ends: 97 [2021-11-25 20:15:02,456 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 20:15:02,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2021-11-25 20:15:02,458 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:02,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 30 Invalid, 2523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2385 Invalid, 0 Unknown, 64 Unchecked, 0.8s Time] [2021-11-25 20:15:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 20:15:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-25 20:15:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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 20:15:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-25 20:15:02,460 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-11-25 20:15:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:02,461 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-25 20:15:02,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:15:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-25 20:15:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 20:15:02,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:02,462 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1] [2021-11-25 20:15:02,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:02,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 20:15:02,685 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash 127058619, now seen corresponding path program 29 times [2021-11-25 20:15:02,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:02,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699412020] [2021-11-25 20:15:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:02,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:02,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 169 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:03,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:03,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699412020] [2021-11-25 20:15:03,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699412020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:03,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656241556] [2021-11-25 20:15:03,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:03,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:03,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:03,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:03,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 20:15:03,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 20:15:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-25 20:15:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:04,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:05,545 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 15 treesize of output 11 [2021-11-25 20:15:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:06,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656241556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:06,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046891339] [2021-11-25 20:15:06,347 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:06,347 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:06,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:06,348 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:06,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:06,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:06,387 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 14 treesize of output 10 [2021-11-25 20:15:06,420 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 14 treesize of output 10 [2021-11-25 20:15:06,448 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 14 treesize of output 10 [2021-11-25 20:15:06,511 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:07,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11166#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:07,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:07,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 98 [2021-11-25 20:15:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933232674] [2021-11-25 20:15:07,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:07,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-25 20:15:07,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-25 20:15:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1455, Invalid=9675, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 20:15:07,091 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 100 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 99 states have internal predecessors, (192), 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 20:15:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:08,282 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-25 20:15:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-25 20:15:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 99 states have internal predecessors, (192), 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 64 [2021-11-25 20:15:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:08,283 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:15:08,283 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 20:15:08,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4966 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2688, Invalid=12564, Unknown=0, NotChecked=0, Total=15252 [2021-11-25 20:15:08,284 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 325 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:08,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 0 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:15:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 20:15:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-25 20:15:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 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 20:15:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-11-25 20:15:08,286 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2021-11-25 20:15:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:08,286 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-11-25 20:15:08,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.9393939393939394) internal successors, (192), 99 states have internal predecessors, (192), 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 20:15:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-11-25 20:15:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 20:15:08,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:08,286 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2021-11-25 20:15:08,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 20:15:08,487 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1844247988, now seen corresponding path program 30 times [2021-11-25 20:15:08,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:08,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669883736] [2021-11-25 20:15:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:08,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:09,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669883736] [2021-11-25 20:15:09,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669883736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203523939] [2021-11-25 20:15:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:15:09,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:09,305 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:09,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 20:15:09,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:15:09,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-25 20:15:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:10,369 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 14 treesize of output 10 [2021-11-25 20:15:10,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:15:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:15:10,642 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 26 treesize of output 22 [2021-11-25 20:15:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:10,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203523939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1678460242] [2021-11-25 20:15:10,861 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:10,861 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:10,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:10,862 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:10,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:10,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:10,892 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 14 treesize of output 10 [2021-11-25 20:15:10,914 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 14 treesize of output 10 [2021-11-25 20:15:10,937 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 14 treesize of output 10 [2021-11-25 20:15:10,990 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:11,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11792#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:11,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:11,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:11,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2021-11-25 20:15:11,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975533721] [2021-11-25 20:15:11,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:11,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-25 20:15:11,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-25 20:15:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3989, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 20:15:11,606 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 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 20:15:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:13,546 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-11-25 20:15:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-25 20:15:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 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 66 [2021-11-25 20:15:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:13,547 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:15:13,547 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 20:15:13,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=433, Invalid=9073, Unknown=0, NotChecked=0, Total=9506 [2021-11-25 20:15:13,549 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 56 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:13,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 29 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:15:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 20:15:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-25 20:15:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 20:15:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-25 20:15:13,551 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2021-11-25 20:15:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:13,552 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-25 20:15:13,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 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 20:15:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-25 20:15:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 20:15:13,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:13,553 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1] [2021-11-25 20:15:13,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:13,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:13,768 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2050929423, now seen corresponding path program 31 times [2021-11-25 20:15:13,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34575673] [2021-11-25 20:15:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:13,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:14,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34575673] [2021-11-25 20:15:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34575673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452201021] [2021-11-25 20:15:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:15:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:14,446 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:14,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 20:15:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-25 20:15:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:14,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:15,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:17,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452201021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786875448] [2021-11-25 20:15:17,686 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:17,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:17,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:17,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:17,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:17,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:17,736 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 14 treesize of output 10 [2021-11-25 20:15:17,772 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 14 treesize of output 10 [2021-11-25 20:15:17,797 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 14 treesize of output 10 [2021-11-25 20:15:17,854 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:18,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12543#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:18,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:18,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:18,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 103 [2021-11-25 20:15:18,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469071683] [2021-11-25 20:15:18,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:18,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-25 20:15:18,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-25 20:15:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1356, Invalid=10854, Unknown=0, NotChecked=0, Total=12210 [2021-11-25 20:15:18,539 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 105 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 104 states have internal predecessors, (204), 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 20:15:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:19,677 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-11-25 20:15:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-25 20:15:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 104 states have internal predecessors, (204), 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 68 [2021-11-25 20:15:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:19,678 INFO L225 Difference]: With dead ends: 72 [2021-11-25 20:15:19,678 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 20:15:19,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5703 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2568, Invalid=14202, Unknown=0, NotChecked=0, Total=16770 [2021-11-25 20:15:19,679 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:19,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 0 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:15:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 20:15:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-25 20:15:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 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 20:15:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-11-25 20:15:19,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2021-11-25 20:15:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:19,681 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-11-25 20:15:19,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 1.9615384615384615) internal successors, (204), 104 states have internal predecessors, (204), 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 20:15:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-11-25 20:15:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:15:19,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:19,682 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2021-11-25 20:15:19,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:19,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 20:15:19,883 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash -446813944, now seen corresponding path program 32 times [2021-11-25 20:15:19,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:19,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032118869] [2021-11-25 20:15:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:19,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:20,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032118869] [2021-11-25 20:15:20,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032118869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250271367] [2021-11-25 20:15:20,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:20,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:20,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:20,801 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:20,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 20:15:21,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-25 20:15:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:21,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-25 20:15:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:22,047 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 14 treesize of output 10 [2021-11-25 20:15:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:15:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:22,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:15:22,316 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 26 treesize of output 22 [2021-11-25 20:15:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:22,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250271367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132179811] [2021-11-25 20:15:22,537 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:22,538 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:22,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:22,538 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:22,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:22,569 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 14 treesize of output 10 [2021-11-25 20:15:22,590 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 14 treesize of output 10 [2021-11-25 20:15:22,615 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 14 treesize of output 10 [2021-11-25 20:15:22,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:23,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13206#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:23,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:23,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:23,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 61 [2021-11-25 20:15:23,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672646302] [2021-11-25 20:15:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:23,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-25 20:15:23,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-25 20:15:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=4378, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 20:15:23,259 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 61 states have internal predecessors, (113), 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 20:15:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:25,477 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-11-25 20:15:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 20:15:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 61 states have internal predecessors, (113), 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 70 [2021-11-25 20:15:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:25,478 INFO L225 Difference]: With dead ends: 109 [2021-11-25 20:15:25,478 INFO L226 Difference]: Without dead ends: 74 [2021-11-25 20:15:25,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=455, Invalid=10051, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 20:15:25,479 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:25,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 36 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3062 Invalid, 0 Unknown, 66 Unchecked, 1.0s Time] [2021-11-25 20:15:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-25 20:15:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-25 20:15:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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 20:15:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-25 20:15:25,481 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2021-11-25 20:15:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:25,482 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-25 20:15:25,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 61 states have internal predecessors, (113), 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 20:15:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-25 20:15:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 20:15:25,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:25,483 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1] [2021-11-25 20:15:25,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 20:15:25,693 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1557117155, now seen corresponding path program 33 times [2021-11-25 20:15:25,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:25,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838180963] [2021-11-25 20:15:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:25,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 225 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:26,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838180963] [2021-11-25 20:15:26,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838180963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118407120] [2021-11-25 20:15:26,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:15:26,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:26,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:26,586 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:26,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 20:15:27,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:15:27,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:27,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-25 20:15:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:27,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:28,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118407120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612593473] [2021-11-25 20:15:30,411 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:30,411 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:30,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:30,412 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:30,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:30,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:30,441 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 11 treesize of output 7 [2021-11-25 20:15:30,463 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 14 treesize of output 10 [2021-11-25 20:15:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:15:30,499 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 14 treesize of output 10 [2021-11-25 20:15:30,597 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:31,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13999#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:31,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:31,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:31,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 107 [2021-11-25 20:15:31,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738430708] [2021-11-25 20:15:31,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:31,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-25 20:15:31,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-25 20:15:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1498, Invalid=11612, Unknown=0, NotChecked=0, Total=13110 [2021-11-25 20:15:31,191 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 109 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 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 20:15:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:32,410 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-25 20:15:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 20:15:32,410 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 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 72 [2021-11-25 20:15:32,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:32,411 INFO L225 Difference]: With dead ends: 76 [2021-11-25 20:15:32,411 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 20:15:32,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6175 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2842, Invalid=15248, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 20:15:32,413 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 172 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:32,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 0 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:15:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 20:15:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-25 20:15:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 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 20:15:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-11-25 20:15:32,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2021-11-25 20:15:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:32,416 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-11-25 20:15:32,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 108 states have internal predecessors, (215), 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 20:15:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-11-25 20:15:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:15:32,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:32,418 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2021-11-25 20:15:32,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-25 20:15:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:32,625 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1740966364, now seen corresponding path program 34 times [2021-11-25 20:15:32,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337489397] [2021-11-25 20:15:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:32,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:33,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337489397] [2021-11-25 20:15:33,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337489397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:33,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310176618] [2021-11-25 20:15:33,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:15:33,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:33,561 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:33,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 20:15:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-25 20:15:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:15:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:15:36,482 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-25 20:15:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:38,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-25 20:15:38,380 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 20 treesize of output 18 [2021-11-25 20:15:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 274 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:40,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310176618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807860253] [2021-11-25 20:15:40,563 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:40,563 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:40,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:40,563 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:40,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:40,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:40,595 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 14 treesize of output 10 [2021-11-25 20:15:40,619 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 14 treesize of output 10 [2021-11-25 20:15:40,640 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 14 treesize of output 10 [2021-11-25 20:15:40,716 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:41,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14751#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:41,581 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:41,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:41,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 116 [2021-11-25 20:15:41,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033244897] [2021-11-25 20:15:41,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:41,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-25 20:15:41,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-25 20:15:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=13723, Unknown=0, NotChecked=0, Total=15006 [2021-11-25 20:15:41,583 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 117 states, 117 states have (on average 1.8632478632478633) internal successors, (218), 116 states have internal predecessors, (218), 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 20:15:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:44,108 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2021-11-25 20:15:44,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-25 20:15:44,108 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.8632478632478633) internal successors, (218), 116 states have internal predecessors, (218), 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 74 [2021-11-25 20:15:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:44,109 INFO L225 Difference]: With dead ends: 115 [2021-11-25 20:15:44,109 INFO L226 Difference]: Without dead ends: 78 [2021-11-25 20:15:44,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2220, Invalid=24186, Unknown=0, NotChecked=0, Total=26406 [2021-11-25 20:15:44,110 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:44,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1717 Invalid, 0 Unknown, 162 Unchecked, 0.6s Time] [2021-11-25 20:15:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-25 20:15:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-25 20:15:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 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 20:15:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-11-25 20:15:44,113 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2021-11-25 20:15:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:44,113 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-11-25 20:15:44,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.8632478632478633) internal successors, (218), 116 states have internal predecessors, (218), 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 20:15:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-11-25 20:15:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:15:44,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:44,114 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1] [2021-11-25 20:15:44,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:44,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-25 20:15:44,325 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:44,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1444596681, now seen corresponding path program 35 times [2021-11-25 20:15:44,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:44,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848621858] [2021-11-25 20:15:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:44,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 256 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:45,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848621858] [2021-11-25 20:15:45,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848621858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711060417] [2021-11-25 20:15:45,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:15:45,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:45,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:45,299 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:45,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 20:15:45,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-25 20:15:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-25 20:15:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:47,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:48,234 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 7 treesize of output 5 [2021-11-25 20:15:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:48,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711060417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:48,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461162889] [2021-11-25 20:15:48,336 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:48,337 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:48,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:48,337 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:48,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:48,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:48,374 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 11 treesize of output 7 [2021-11-25 20:15:48,407 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 14 treesize of output 10 [2021-11-25 20:15:48,431 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 14 treesize of output 10 [2021-11-25 20:15:48,450 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 14 treesize of output 10 [2021-11-25 20:15:48,532 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:49,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15594#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:49,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:49,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:49,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 97 [2021-11-25 20:15:49,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888245566] [2021-11-25 20:15:49,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:49,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-25 20:15:49,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-25 20:15:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1581, Invalid=9339, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 20:15:49,026 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 99 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 98 states have internal predecessors, (190), 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 20:15:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:50,275 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-25 20:15:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 20:15:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 98 states have internal predecessors, (190), 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 76 [2021-11-25 20:15:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:50,276 INFO L225 Difference]: With dead ends: 80 [2021-11-25 20:15:50,276 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 20:15:50,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2874, Invalid=12876, Unknown=0, NotChecked=0, Total=15750 [2021-11-25 20:15:50,278 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 263 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:50,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 0 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:15:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 20:15:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-25 20:15:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 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 20:15:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-11-25 20:15:50,281 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2021-11-25 20:15:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:50,282 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-11-25 20:15:50,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 98 states have internal predecessors, (190), 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 20:15:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-11-25 20:15:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 20:15:50,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:50,283 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2021-11-25 20:15:50,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:50,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-25 20:15:50,497 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash -982974416, now seen corresponding path program 36 times [2021-11-25 20:15:50,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857397917] [2021-11-25 20:15:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:50,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:51,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857397917] [2021-11-25 20:15:51,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857397917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581146962] [2021-11-25 20:15:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:15:51,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:51,591 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:51,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 20:15:52,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:15:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:15:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-25 20:15:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:53,011 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 14 treesize of output 10 [2021-11-25 20:15:53,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:15:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:53,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:53,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:15:53,352 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 26 treesize of output 22 [2021-11-25 20:15:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581146962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392701521] [2021-11-25 20:15:53,599 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:15:53,599 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:53,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:53,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:53,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:53,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:15:53,638 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 14 treesize of output 10 [2021-11-25 20:15:53,662 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 14 treesize of output 10 [2021-11-25 20:15:53,692 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 14 treesize of output 10 [2021-11-25 20:15:53,772 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:54,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16331#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:15:54,416 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:15:54,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:54,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2021-11-25 20:15:54,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077201931] [2021-11-25 20:15:54,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:15:54,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-25 20:15:54,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-25 20:15:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 20:15:54,419 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 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 20:15:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:57,098 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-11-25 20:15:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-25 20:15:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 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 78 [2021-11-25 20:15:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:57,105 INFO L225 Difference]: With dead ends: 121 [2021-11-25 20:15:57,105 INFO L226 Difference]: Without dead ends: 82 [2021-11-25 20:15:57,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=499, Invalid=12157, Unknown=0, NotChecked=0, Total=12656 [2021-11-25 20:15:57,106 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:57,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 32 Invalid, 3678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3539 Invalid, 0 Unknown, 46 Unchecked, 1.2s Time] [2021-11-25 20:15:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-25 20:15:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-25 20:15:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 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 20:15:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-25 20:15:57,109 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2021-11-25 20:15:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-25 20:15:57,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 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 20:15:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-25 20:15:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:15:57,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:57,110 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1] [2021-11-25 20:15:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:57,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:57,325 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:15:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1281787147, now seen corresponding path program 37 times [2021-11-25 20:15:57,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:57,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690170198] [2021-11-25 20:15:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:57,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 289 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:15:58,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690170198] [2021-11-25 20:15:58,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690170198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134492451] [2021-11-25 20:15:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:15:58,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:58,309 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:58,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-25 20:15:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-25 20:15:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:58,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:00,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:02,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134492451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:02,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83124559] [2021-11-25 20:16:02,637 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:02,637 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:02,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:02,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:02,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:02,687 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 14 treesize of output 10 [2021-11-25 20:16:02,721 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 14 treesize of output 10 [2021-11-25 20:16:02,749 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 14 treesize of output 10 [2021-11-25 20:16:02,799 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:03,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17214#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:03,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:03,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:03,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 121 [2021-11-25 20:16:03,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328897476] [2021-11-25 20:16:03,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-25 20:16:03,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-25 20:16:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=14682, Unknown=0, NotChecked=0, Total=16512 [2021-11-25 20:16:03,541 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 123 states, 122 states have (on average 1.9672131147540983) internal successors, (240), 122 states have internal predecessors, (240), 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 20:16:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:05,094 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-25 20:16:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-25 20:16:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 1.9672131147540983) internal successors, (240), 122 states have internal predecessors, (240), 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 20:16:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:05,095 INFO L225 Difference]: With dead ends: 84 [2021-11-25 20:16:05,096 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 20:16:05,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7824 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3465, Invalid=19185, Unknown=0, NotChecked=0, Total=22650 [2021-11-25 20:16:05,098 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:05,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:16:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 20:16:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-25 20:16:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 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 20:16:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-11-25 20:16:05,101 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-11-25 20:16:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:05,102 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-11-25 20:16:05,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 1.9672131147540983) internal successors, (240), 122 states have internal predecessors, (240), 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 20:16:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-11-25 20:16:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 20:16:05,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:05,103 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2021-11-25 20:16:05,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:05,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:05,320 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -858166268, now seen corresponding path program 38 times [2021-11-25 20:16:05,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:05,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797309250] [2021-11-25 20:16:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:05,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:06,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797309250] [2021-11-25 20:16:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797309250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839813862] [2021-11-25 20:16:06,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:06,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:06,489 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:06,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-25 20:16:07,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-25 20:16:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-25 20:16:07,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:08,188 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 14 treesize of output 10 [2021-11-25 20:16:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:16:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:16:08,494 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 26 treesize of output 22 [2021-11-25 20:16:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839813862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74495997] [2021-11-25 20:16:08,752 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:08,753 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:08,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:08,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:08,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:08,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:16:08,805 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 14 treesize of output 10 [2021-11-25 20:16:08,829 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 14 treesize of output 10 [2021-11-25 20:16:08,846 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 14 treesize of output 10 [2021-11-25 20:16:08,920 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:09,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17988#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:09,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:09,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:09,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 70 [2021-11-25 20:16:09,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760880357] [2021-11-25 20:16:09,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:09,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-25 20:16:09,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-25 20:16:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5653, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 20:16:09,495 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 71 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 70 states have internal predecessors, (131), 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 20:16:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:12,543 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-11-25 20:16:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-25 20:16:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 70 states have internal predecessors, (131), 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 82 [2021-11-25 20:16:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:12,544 INFO L225 Difference]: With dead ends: 127 [2021-11-25 20:16:12,544 INFO L226 Difference]: Without dead ends: 86 [2021-11-25 20:16:12,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=521, Invalid=13285, Unknown=0, NotChecked=0, Total=13806 [2021-11-25 20:16:12,545 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 4464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:12,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 45 Invalid, 4464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4281 Invalid, 0 Unknown, 85 Unchecked, 1.4s Time] [2021-11-25 20:16:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-25 20:16:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-25 20:16:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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 20:16:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-11-25 20:16:12,547 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2021-11-25 20:16:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-11-25 20:16:12,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 70 states have internal predecessors, (131), 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 20:16:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-11-25 20:16:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 20:16:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:12,548 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1] [2021-11-25 20:16:12,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:12,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:12,749 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:12,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -578614433, now seen corresponding path program 39 times [2021-11-25 20:16:12,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999619843] [2021-11-25 20:16:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:12,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 324 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:13,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999619843] [2021-11-25 20:16:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999619843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961151740] [2021-11-25 20:16:13,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:16:13,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:13,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:13,688 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:13,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 20:16:14,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:16:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-25 20:16:14,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:16,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961151740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:18,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556810535] [2021-11-25 20:16:18,719 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:18,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:18,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:18,720 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:18,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:18,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:18,749 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 14 treesize of output 10 [2021-11-25 20:16:18,771 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 14 treesize of output 10 [2021-11-25 20:16:18,798 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 14 treesize of output 10 [2021-11-25 20:16:18,840 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:19,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18913#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:19,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:19,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:19,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 125 [2021-11-25 20:16:19,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946328810] [2021-11-25 20:16:19,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-25 20:16:19,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-25 20:16:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1996, Invalid=15560, Unknown=0, NotChecked=0, Total=17556 [2021-11-25 20:16:19,601 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 127 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 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 20:16:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:21,197 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-25 20:16:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 20:16:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 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 84 [2021-11-25 20:16:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:21,198 INFO L225 Difference]: With dead ends: 88 [2021-11-25 20:16:21,198 INFO L226 Difference]: Without dead ends: 88 [2021-11-25 20:16:21,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8374 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3784, Invalid=20396, Unknown=0, NotChecked=0, Total=24180 [2021-11-25 20:16:21,199 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 245 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:21,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 0 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:16:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-25 20:16:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-25 20:16:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 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 20:16:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-25 20:16:21,201 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2021-11-25 20:16:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:21,201 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-25 20:16:21,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 1.992063492063492) internal successors, (251), 126 states have internal predecessors, (251), 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 20:16:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-25 20:16:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:16:21,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:21,201 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2021-11-25 20:16:21,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:21,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-25 20:16:21,402 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:21,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1997689512, now seen corresponding path program 40 times [2021-11-25 20:16:21,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:21,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733130102] [2021-11-25 20:16:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:21,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:22,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733130102] [2021-11-25 20:16:22,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733130102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828780929] [2021-11-25 20:16:22,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:16:22,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:22,519 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:22,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-25 20:16:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-25 20:16:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:23,636 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 14 treesize of output 10 [2021-11-25 20:16:23,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:16:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:23,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:16:23,953 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 26 treesize of output 22 [2021-11-25 20:16:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828780929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:24,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57098523] [2021-11-25 20:16:24,269 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:24,270 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:24,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:24,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:24,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:24,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:24,306 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 11 treesize of output 7 [2021-11-25 20:16:24,336 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 14 treesize of output 10 [2021-11-25 20:16:24,362 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 14 treesize of output 10 [2021-11-25 20:16:24,384 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 14 treesize of output 10 [2021-11-25 20:16:24,472 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:25,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19724#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:25,126 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:25,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:25,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 73 [2021-11-25 20:16:25,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626241502] [2021-11-25 20:16:25,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:25,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-25 20:16:25,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:25,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-25 20:16:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6114, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 20:16:25,129 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 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 20:16:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:28,370 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-11-25 20:16:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-25 20:16:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 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 86 [2021-11-25 20:16:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:28,371 INFO L225 Difference]: With dead ends: 133 [2021-11-25 20:16:28,371 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 20:16:28,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=543, Invalid=14463, Unknown=0, NotChecked=0, Total=15006 [2021-11-25 20:16:28,373 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 73 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:28,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 46 Invalid, 4704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4543 Invalid, 0 Unknown, 78 Unchecked, 1.5s Time] [2021-11-25 20:16:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 20:16:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-25 20:16:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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 20:16:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-11-25 20:16:28,376 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-11-25 20:16:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:28,377 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-11-25 20:16:28,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 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 20:16:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-11-25 20:16:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 20:16:28,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:28,378 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1] [2021-11-25 20:16:28,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:28,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-25 20:16:28,593 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash -491641037, now seen corresponding path program 41 times [2021-11-25 20:16:28,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:28,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613076340] [2021-11-25 20:16:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:28,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 361 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:29,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613076340] [2021-11-25 20:16:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613076340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239222408] [2021-11-25 20:16:29,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:29,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:29,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:29,707 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:29,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-25 20:16:30,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-25 20:16:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-25 20:16:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:33,115 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 7 treesize of output 5 [2021-11-25 20:16:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:33,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239222408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619056658] [2021-11-25 20:16:33,213 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:33,214 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:33,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:33,214 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:33,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:33,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:33,241 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 14 treesize of output 10 [2021-11-25 20:16:33,265 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 14 treesize of output 10 [2021-11-25 20:16:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:16:33,334 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:33,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20674#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:33,957 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:33,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:33,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 112 [2021-11-25 20:16:33,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106582247] [2021-11-25 20:16:33,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:33,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-25 20:16:33,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-25 20:16:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=12192, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 20:16:33,959 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 114 states, 113 states have (on average 1.9469026548672566) internal successors, (220), 113 states have internal predecessors, (220), 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 20:16:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:35,244 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-11-25 20:16:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 20:16:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.9469026548672566) internal successors, (220), 113 states have internal predecessors, (220), 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 88 [2021-11-25 20:16:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:35,247 INFO L225 Difference]: With dead ends: 92 [2021-11-25 20:16:35,247 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 20:16:35,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6236 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3783, Invalid=16809, Unknown=0, NotChecked=0, Total=20592 [2021-11-25 20:16:35,249 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:35,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:16:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 20:16:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-25 20:16:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 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 20:16:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-25 20:16:35,252 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2021-11-25 20:16:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:35,252 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-25 20:16:35,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.9469026548672566) internal successors, (220), 113 states have internal predecessors, (220), 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 20:16:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-25 20:16:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 20:16:35,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:35,253 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2021-11-25 20:16:35,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:35,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:35,461 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -20634580, now seen corresponding path program 42 times [2021-11-25 20:16:35,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121302967] [2021-11-25 20:16:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:35,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:36,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121302967] [2021-11-25 20:16:36,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121302967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:36,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851349650] [2021-11-25 20:16:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:16:36,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:36,731 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:36,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 20:16:37,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:16:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:37,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-25 20:16:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:38,855 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 14 treesize of output 10 [2021-11-25 20:16:39,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:16:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:39,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:16:39,240 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 26 treesize of output 22 [2021-11-25 20:16:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:39,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851349650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573968904] [2021-11-25 20:16:39,517 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:39,517 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:39,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:39,517 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:39,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:39,548 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 14 treesize of output 10 [2021-11-25 20:16:39,575 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 14 treesize of output 10 [2021-11-25 20:16:39,597 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 14 treesize of output 10 [2021-11-25 20:16:39,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:40,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21522#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:40,349 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:40,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:40,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 76 [2021-11-25 20:16:40,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012041338] [2021-11-25 20:16:40,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:40,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-25 20:16:40,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-25 20:16:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=6593, Unknown=0, NotChecked=0, Total=6806 [2021-11-25 20:16:40,351 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 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 20:16:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:43,815 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2021-11-25 20:16:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-25 20:16:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 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 90 [2021-11-25 20:16:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:43,816 INFO L225 Difference]: With dead ends: 139 [2021-11-25 20:16:43,816 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 20:16:43,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=565, Invalid=15691, Unknown=0, NotChecked=0, Total=16256 [2021-11-25 20:16:43,817 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 4840 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 4840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:43,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 45 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 4840 Invalid, 0 Unknown, 92 Unchecked, 1.6s Time] [2021-11-25 20:16:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 20:16:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-25 20:16:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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 20:16:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-25 20:16:43,819 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2021-11-25 20:16:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-25 20:16:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 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 20:16:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-25 20:16:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:16:43,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:43,821 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1] [2021-11-25 20:16:43,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:44,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-25 20:16:44,025 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1951188857, now seen corresponding path program 43 times [2021-11-25 20:16:44,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:44,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477811720] [2021-11-25 20:16:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:44,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 400 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:45,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477811720] [2021-11-25 20:16:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477811720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:45,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081513782] [2021-11-25 20:16:45,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:16:45,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:45,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:45,179 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:45,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-25 20:16:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-25 20:16:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:45,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:47,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 484 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:50,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081513782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:50,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399638917] [2021-11-25 20:16:50,522 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:50,522 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:50,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:50,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:50,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:50,557 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 11 treesize of output 7 [2021-11-25 20:16:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:16:50,607 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 14 treesize of output 10 [2021-11-25 20:16:50,622 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 14 treesize of output 10 [2021-11-25 20:16:50,685 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:51,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22537#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:51,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:51,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:51,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 139 [2021-11-25 20:16:51,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73922720] [2021-11-25 20:16:51,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:51,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-25 20:16:51,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-25 20:16:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2376, Invalid=19086, Unknown=0, NotChecked=0, Total=21462 [2021-11-25 20:16:51,419 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 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 20:16:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:53,315 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-11-25 20:16:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 20:16:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 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 92 [2021-11-25 20:16:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:53,316 INFO L225 Difference]: With dead ends: 96 [2021-11-25 20:16:53,316 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 20:16:53,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10278 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4497, Invalid=24915, Unknown=0, NotChecked=0, Total=29412 [2021-11-25 20:16:53,318 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 188 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3143 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:53,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 0 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:16:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 20:16:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-25 20:16:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 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 20:16:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-11-25 20:16:53,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2021-11-25 20:16:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-11-25 20:16:53,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 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 20:16:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-11-25 20:16:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:16:53,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:53,323 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2021-11-25 20:16:53,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-25 20:16:53,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:53,537 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:16:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1808216192, now seen corresponding path program 44 times [2021-11-25 20:16:53,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:53,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722492128] [2021-11-25 20:16:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:53,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:54,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:54,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722492128] [2021-11-25 20:16:54,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722492128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320919874] [2021-11-25 20:16:54,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:16:54,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:54,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:54,990 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:54,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-25 20:16:56,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 20:16:56,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:16:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-25 20:16:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:57,329 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 14 treesize of output 10 [2021-11-25 20:16:57,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:16:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:57,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:57,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:16:57,677 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 26 treesize of output 22 [2021-11-25 20:16:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:16:57,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320919874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904715577] [2021-11-25 20:16:57,991 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:16:57,992 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:57,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:57,992 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:57,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:58,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:16:58,035 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 11 treesize of output 7 [2021-11-25 20:16:58,064 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 14 treesize of output 10 [2021-11-25 20:16:58,092 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 14 treesize of output 10 [2021-11-25 20:16:58,112 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 14 treesize of output 10 [2021-11-25 20:16:58,196 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:16:58,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23422#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:16:58,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:16:58,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:16:58,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 79 [2021-11-25 20:16:58,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477211372] [2021-11-25 20:16:58,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:16:58,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-25 20:16:58,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:58,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-25 20:16:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7090, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 20:16:58,900 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 80 states, 80 states have (on average 1.8625) internal successors, (149), 79 states have internal predecessors, (149), 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 20:17:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:02,865 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-11-25 20:17:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-25 20:17:02,866 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.8625) internal successors, (149), 79 states have internal predecessors, (149), 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 94 [2021-11-25 20:17:02,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:02,866 INFO L225 Difference]: With dead ends: 145 [2021-11-25 20:17:02,867 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 20:17:02,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=587, Invalid=16969, Unknown=0, NotChecked=0, Total=17556 [2021-11-25 20:17:02,868 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 76 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5840 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 5840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:02,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 53 Invalid, 5930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 5840 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 20:17:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 20:17:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-25 20:17:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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 20:17:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-25 20:17:02,871 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2021-11-25 20:17:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:02,872 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-25 20:17:02,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.8625) internal successors, (149), 79 states have internal predecessors, (149), 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 20:17:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-25 20:17:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 20:17:02,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:02,873 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1] [2021-11-25 20:17:02,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-25 20:17:03,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:03,089 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -259154085, now seen corresponding path program 45 times [2021-11-25 20:17:03,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:03,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574461764] [2021-11-25 20:17:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:03,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 441 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:04,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574461764] [2021-11-25 20:17:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574461764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092502377] [2021-11-25 20:17:04,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:17:04,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:04,224 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 20:17:05,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:17:05,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-25 20:17:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:05,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 484 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:07,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 529 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:10,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092502377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489835468] [2021-11-25 20:17:10,774 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:17:10,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:10,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:10,774 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:10,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:10,828 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 14 treesize of output 10 [2021-11-25 20:17:10,854 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 14 treesize of output 10 [2021-11-25 20:17:10,875 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 14 treesize of output 10 [2021-11-25 20:17:10,940 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:11,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24479#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:11,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:11,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:11,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 143 [2021-11-25 20:17:11,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511485038] [2021-11-25 20:17:11,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:11,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-25 20:17:11,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-25 20:17:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2566, Invalid=20084, Unknown=0, NotChecked=0, Total=22650 [2021-11-25 20:17:11,770 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 145 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 144 states have internal predecessors, (287), 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 20:17:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:13,732 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-25 20:17:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-25 20:17:13,733 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 144 states have internal predecessors, (287), 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 96 [2021-11-25 20:17:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:13,733 INFO L225 Difference]: With dead ends: 100 [2021-11-25 20:17:13,733 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 20:17:13,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4861, Invalid=26291, Unknown=0, NotChecked=0, Total=31152 [2021-11-25 20:17:13,735 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 253 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:13,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 0 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3177 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 20:17:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 20:17:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-25 20:17:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 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 20:17:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-25 20:17:13,737 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2021-11-25 20:17:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:13,737 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-25 20:17:13,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 144 states have internal predecessors, (287), 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 20:17:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-25 20:17:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:17:13,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:13,738 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2021-11-25 20:17:13,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:13,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-25 20:17:13,938 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 61026900, now seen corresponding path program 46 times [2021-11-25 20:17:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024253053] [2021-11-25 20:17:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:13,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:15,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024253053] [2021-11-25 20:17:15,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024253053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298655469] [2021-11-25 20:17:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:17:15,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:15,353 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:15,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-25 20:17:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-25 20:17:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:16,728 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 14 treesize of output 10 [2021-11-25 20:17:16,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:17:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:16,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:17,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:17:17,078 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 26 treesize of output 22 [2021-11-25 20:17:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 24 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:17,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298655469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:17,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344335245] [2021-11-25 20:17:17,377 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:17:17,377 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:17,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:17,378 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:17,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:17,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:17,421 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 14 treesize of output 10 [2021-11-25 20:17:17,451 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 14 treesize of output 10 [2021-11-25 20:17:17,479 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 14 treesize of output 10 [2021-11-25 20:17:17,534 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:18,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25401#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:18,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:18,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:18,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 82 [2021-11-25 20:17:18,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938819862] [2021-11-25 20:17:18,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:18,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-25 20:17:18,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:18,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-25 20:17:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=7605, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 20:17:18,300 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 83 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 82 states have internal predecessors, (155), 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 20:17:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:22,302 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2021-11-25 20:17:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-25 20:17:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 82 states have internal predecessors, (155), 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 98 [2021-11-25 20:17:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:22,303 INFO L225 Difference]: With dead ends: 151 [2021-11-25 20:17:22,303 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 20:17:22,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=609, Invalid=18297, Unknown=0, NotChecked=0, Total=18906 [2021-11-25 20:17:22,305 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 79 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5573 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 5573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:22,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 45 Invalid, 5765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 5573 Invalid, 0 Unknown, 98 Unchecked, 1.8s Time] [2021-11-25 20:17:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 20:17:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-25 20:17:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:17:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-25 20:17:22,308 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2021-11-25 20:17:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:22,308 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-25 20:17:22,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.8674698795180722) internal successors, (155), 82 states have internal predecessors, (155), 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 20:17:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-25 20:17:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:17:22,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:22,309 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1] [2021-11-25 20:17:22,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:22,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-25 20:17:22,513 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash -812598353, now seen corresponding path program 47 times [2021-11-25 20:17:22,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:22,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640783570] [2021-11-25 20:17:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:22,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 484 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:23,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640783570] [2021-11-25 20:17:23,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640783570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:23,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055290499] [2021-11-25 20:17:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:17:23,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:23,879 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:23,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-25 20:17:25,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-25 20:17:25,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:25,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-25 20:17:25,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 529 proven. 623 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:27,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 576 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055290499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86570608] [2021-11-25 20:17:31,194 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:17:31,194 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:31,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:31,195 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:31,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:31,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:31,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:17:31,265 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 14 treesize of output 10 [2021-11-25 20:17:31,283 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 14 treesize of output 10 [2021-11-25 20:17:31,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:32,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26505#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:32,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:32,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:32,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 152 [2021-11-25 20:17:32,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234026435] [2021-11-25 20:17:32,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:32,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-11-25 20:17:32,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-11-25 20:17:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3361, Invalid=22079, Unknown=0, NotChecked=0, Total=25440 [2021-11-25 20:17:32,100 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 154 states, 153 states have (on average 1.9607843137254901) internal successors, (300), 153 states have internal predecessors, (300), 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 20:17:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:34,097 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-11-25 20:17:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 20:17:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 1.9607843137254901) internal successors, (300), 153 states have internal predecessors, (300), 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 100 [2021-11-25 20:17:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:34,098 INFO L225 Difference]: With dead ends: 104 [2021-11-25 20:17:34,098 INFO L226 Difference]: Without dead ends: 104 [2021-11-25 20:17:34,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11717 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=6187, Invalid=28595, Unknown=0, NotChecked=0, Total=34782 [2021-11-25 20:17:34,100 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 337 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:34,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 0 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:17:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-25 20:17:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-25 20:17:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 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 20:17:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-11-25 20:17:34,103 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2021-11-25 20:17:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:34,103 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-11-25 20:17:34,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 153 states have (on average 1.9607843137254901) internal successors, (300), 153 states have internal predecessors, (300), 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 20:17:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-11-25 20:17:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 20:17:34,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:34,105 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2021-11-25 20:17:34,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:34,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:34,321 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash 777030056, now seen corresponding path program 48 times [2021-11-25 20:17:34,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:34,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646274733] [2021-11-25 20:17:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:34,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:36,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646274733] [2021-11-25 20:17:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646274733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:36,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912691554] [2021-11-25 20:17:36,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:17:36,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:36,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:36,002 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:36,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-25 20:17:37,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:17:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:17:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-25 20:17:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:38,500 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 14 treesize of output 10 [2021-11-25 20:17:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:17:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:38,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:38,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:17:38,918 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 26 treesize of output 22 [2021-11-25 20:17:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 25 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:39,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912691554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:39,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157751011] [2021-11-25 20:17:39,298 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:17:39,298 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:39,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:39,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:39,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:39,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:39,349 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 11 treesize of output 7 [2021-11-25 20:17:39,383 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 14 treesize of output 10 [2021-11-25 20:17:39,407 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 14 treesize of output 10 [2021-11-25 20:17:39,422 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 14 treesize of output 10 [2021-11-25 20:17:39,490 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:40,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27464#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:40,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:40,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:40,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 85 [2021-11-25 20:17:40,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774755707] [2021-11-25 20:17:40,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:40,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-25 20:17:40,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-25 20:17:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8138, Unknown=0, NotChecked=0, Total=8372 [2021-11-25 20:17:40,154 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 86 states, 86 states have (on average 1.872093023255814) internal successors, (161), 85 states have internal predecessors, (161), 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 20:17:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:44,493 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-11-25 20:17:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-25 20:17:44,493 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.872093023255814) internal successors, (161), 85 states have internal predecessors, (161), 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 102 [2021-11-25 20:17:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:44,494 INFO L225 Difference]: With dead ends: 157 [2021-11-25 20:17:44,494 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 20:17:44,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=631, Invalid=19675, Unknown=0, NotChecked=0, Total=20306 [2021-11-25 20:17:44,496 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 110 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 6080 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 6080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:44,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 44 Invalid, 6301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 6080 Invalid, 0 Unknown, 98 Unchecked, 2.0s Time] [2021-11-25 20:17:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 20:17:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-25 20:17:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 20:17:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-25 20:17:44,498 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2021-11-25 20:17:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:44,498 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-25 20:17:44,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.872093023255814) internal successors, (161), 85 states have internal predecessors, (161), 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 20:17:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-25 20:17:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 20:17:44,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:44,499 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1] [2021-11-25 20:17:44,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:44,699 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -883692157, now seen corresponding path program 49 times [2021-11-25 20:17:44,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:44,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79378055] [2021-11-25 20:17:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:44,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 529 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:46,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79378055] [2021-11-25 20:17:46,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79378055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147039248] [2021-11-25 20:17:46,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:17:46,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:46,033 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:46,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-25 20:17:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 143 conjunts are in the unsatisfiable core [2021-11-25 20:17:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 576 proven. 674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:48,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 625 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:52,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147039248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:52,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172871597] [2021-11-25 20:17:52,679 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:17:52,679 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:52,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:52,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:52,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:17:52,706 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 14 treesize of output 10 [2021-11-25 20:17:52,732 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 14 treesize of output 10 [2021-11-25 20:17:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 20:17:52,817 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:53,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28611#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:17:53,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:17:53,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:53,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 157 [2021-11-25 20:17:53,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324754272] [2021-11-25 20:17:53,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:17:53,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2021-11-25 20:17:53,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-11-25 20:17:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2994, Invalid=24066, Unknown=0, NotChecked=0, Total=27060 [2021-11-25 20:17:53,692 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 159 states, 158 states have (on average 1.9746835443037976) internal successors, (312), 158 states have internal predecessors, (312), 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 20:17:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:56,289 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-11-25 20:17:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 20:17:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 158 states have (on average 1.9746835443037976) internal successors, (312), 158 states have internal predecessors, (312), 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 104 [2021-11-25 20:17:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:56,290 INFO L225 Difference]: With dead ends: 108 [2021-11-25 20:17:56,290 INFO L226 Difference]: Without dead ends: 108 [2021-11-25 20:17:56,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13065 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=5664, Invalid=31392, Unknown=0, NotChecked=0, Total=37056 [2021-11-25 20:17:56,293 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 239 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4561 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:56,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 0 Invalid, 4780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 4561 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-25 20:17:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-25 20:17:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-25 20:17:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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 20:17:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-11-25 20:17:56,296 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2021-11-25 20:17:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:56,297 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-11-25 20:17:56,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 158 states have (on average 1.9746835443037976) internal successors, (312), 158 states have internal predecessors, (312), 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 20:17:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-11-25 20:17:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 20:17:56,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:56,298 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2021-11-25 20:17:56,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:56,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:56,517 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:17:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:56,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1175361148, now seen corresponding path program 50 times [2021-11-25 20:17:56,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576043645] [2021-11-25 20:17:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:56,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:17:58,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:58,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576043645] [2021-11-25 20:17:58,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576043645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:58,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285869549] [2021-11-25 20:17:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:17:58,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:58,175 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:58,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-25 20:18:00,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-25 20:18:00,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 174 conjunts are in the unsatisfiable core [2021-11-25 20:18:00,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:02,309 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 14 treesize of output 10 [2021-11-25 20:18:02,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:18:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:18:02,686 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 26 treesize of output 22 [2021-11-25 20:18:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 26 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285869549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647021343] [2021-11-25 20:18:03,033 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:18:03,033 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:03,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:03,033 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:03,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:03,063 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 14 treesize of output 10 [2021-11-25 20:18:03,085 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 14 treesize of output 10 [2021-11-25 20:18:03,112 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 14 treesize of output 10 [2021-11-25 20:18:03,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:18:03,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29607#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:18:03,940 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:18:03,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:18:03,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 88 [2021-11-25 20:18:03,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199694157] [2021-11-25 20:18:03,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:03,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-25 20:18:03,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-25 20:18:03,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=8689, Unknown=0, NotChecked=0, Total=8930 [2021-11-25 20:18:03,941 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 89 states, 89 states have (on average 1.8764044943820224) internal successors, (167), 88 states have internal predecessors, (167), 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 20:18:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:08,759 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2021-11-25 20:18:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-25 20:18:08,759 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8764044943820224) internal successors, (167), 88 states have internal predecessors, (167), 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 106 [2021-11-25 20:18:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:08,760 INFO L225 Difference]: With dead ends: 163 [2021-11-25 20:18:08,760 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 20:18:08,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 276 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2524 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=653, Invalid=21103, Unknown=0, NotChecked=0, Total=21756 [2021-11-25 20:18:08,761 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 113 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 7189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:08,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 47 Invalid, 7189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 6961 Invalid, 0 Unknown, 100 Unchecked, 2.3s Time] [2021-11-25 20:18:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 20:18:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-25 20:18:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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 20:18:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-25 20:18:08,763 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2021-11-25 20:18:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:08,763 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-25 20:18:08,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8764044943820224) internal successors, (167), 88 states have internal predecessors, (167), 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 20:18:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-25 20:18:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:18:08,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:08,764 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1] [2021-11-25 20:18:08,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-25 20:18:08,964 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:18:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 683054295, now seen corresponding path program 51 times [2021-11-25 20:18:08,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785610964] [2021-11-25 20:18:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:08,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 576 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:10,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785610964] [2021-11-25 20:18:10,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785610964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65857954] [2021-11-25 20:18:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:18:10,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:10,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:10,398 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:10,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-25 20:18:14,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:18:14,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-25 20:18:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:14,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 625 proven. 727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:16,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 676 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:20,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65857954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724088117] [2021-11-25 20:18:20,854 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:18:20,854 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:20,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:20,872 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:20,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:20,914 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 14 treesize of output 10 [2021-11-25 20:18:20,948 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 14 treesize of output 10 [2021-11-25 20:18:20,973 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 14 treesize of output 10 [2021-11-25 20:18:21,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:18:21,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30796#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:18:21,974 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:18:21,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:18:21,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 161 [2021-11-25 20:18:21,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833875781] [2021-11-25 20:18:21,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:21,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-25 20:18:21,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-25 20:18:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3208, Invalid=25184, Unknown=0, NotChecked=0, Total=28392 [2021-11-25 20:18:21,977 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 163 states, 162 states have (on average 1.9938271604938271) internal successors, (323), 162 states have internal predecessors, (323), 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 20:18:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:24,450 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-11-25 20:18:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-25 20:18:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 162 states have (on average 1.9938271604938271) internal successors, (323), 162 states have internal predecessors, (323), 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 108 [2021-11-25 20:18:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:24,452 INFO L225 Difference]: With dead ends: 112 [2021-11-25 20:18:24,452 INFO L226 Difference]: Without dead ends: 112 [2021-11-25 20:18:24,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13771 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6073, Invalid=32933, Unknown=0, NotChecked=0, Total=39006 [2021-11-25 20:18:24,455 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 339 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4007 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 4007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:24,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 0 Invalid, 4316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 4007 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:18:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-25 20:18:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-25 20:18:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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 20:18:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-11-25 20:18:24,458 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2021-11-25 20:18:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:24,459 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-11-25 20:18:24,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 162 states have (on average 1.9938271604938271) internal successors, (323), 162 states have internal predecessors, (323), 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 20:18:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-11-25 20:18:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 20:18:24,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:24,460 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2021-11-25 20:18:24,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-25 20:18:24,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-25 20:18:24,669 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:18:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -714819376, now seen corresponding path program 52 times [2021-11-25 20:18:24,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:24,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937826864] [2021-11-25 20:18:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:24,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:26,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:26,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937826864] [2021-11-25 20:18:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937826864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:26,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219518432] [2021-11-25 20:18:26,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:18:26,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:26,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:26,418 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:26,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-25 20:18:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 180 conjunts are in the unsatisfiable core [2021-11-25 20:18:26,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:28,125 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 14 treesize of output 10 [2021-11-25 20:18:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:18:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:28,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:28,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:18:28,519 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 26 treesize of output 22 [2021-11-25 20:18:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 27 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:28,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219518432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:28,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923263298] [2021-11-25 20:18:28,852 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:18:28,852 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:28,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:28,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:28,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:28,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:28,882 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 14 treesize of output 10 [2021-11-25 20:18:28,904 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 14 treesize of output 10 [2021-11-25 20:18:28,929 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 14 treesize of output 10 [2021-11-25 20:18:29,005 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:18:29,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31829#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:18:29,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:18:29,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:18:29,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 91 [2021-11-25 20:18:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110221914] [2021-11-25 20:18:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-25 20:18:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-25 20:18:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=9258, Unknown=0, NotChecked=0, Total=9506 [2021-11-25 20:18:29,850 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 92 states, 92 states have (on average 1.8804347826086956) internal successors, (173), 91 states have internal predecessors, (173), 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 20:18:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:34,869 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2021-11-25 20:18:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-25 20:18:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.8804347826086956) internal successors, (173), 91 states have internal predecessors, (173), 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 110 [2021-11-25 20:18:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:34,871 INFO L225 Difference]: With dead ends: 169 [2021-11-25 20:18:34,871 INFO L226 Difference]: Without dead ends: 114 [2021-11-25 20:18:34,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2021-11-25 20:18:34,872 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 91 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 7053 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 7053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:34,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 45 Invalid, 7160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 7053 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:18:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-25 20:18:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-25 20:18:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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 20:18:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-11-25 20:18:34,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-11-25 20:18:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:34,875 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-11-25 20:18:34,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.8804347826086956) internal successors, (173), 91 states have internal predecessors, (173), 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 20:18:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-11-25 20:18:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 20:18:34,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:34,876 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1] [2021-11-25 20:18:34,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:35,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:35,101 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-11-25 20:18:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash 216011179, now seen corresponding path program 53 times [2021-11-25 20:18:35,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:35,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708210910] [2021-11-25 20:18:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:35,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 625 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:18:36,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708210910] [2021-11-25 20:18:36,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708210910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040166287] [2021-11-25 20:18:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:18:36,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:36,709 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:36,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-25 20:18:41,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-25 20:18:41,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:18:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-25 20:18:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:41,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:41,274 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 15 treesize of output 11 [2021-11-25 20:18:41,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:18:41,461 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 19 treesize of output 19 [2021-11-25 20:18:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2021-11-25 20:18:41,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:42,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-25 20:18:42,333 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 20 treesize of output 18 [2021-11-25 20:18:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2021-11-25 20:18:42,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040166287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:42,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270633087] [2021-11-25 20:18:42,909 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 20:18:42,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:42,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:42,910 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:42,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:42,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:18:42,942 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 14 treesize of output 10 [2021-11-25 20:18:42,964 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 14 treesize of output 10 [2021-11-25 20:18:42,988 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 14 treesize of output 10 [2021-11-25 20:18:43,034 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:18:43,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32959#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:18:43,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:18:43,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:18:43,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 4, 4] total 64 [2021-11-25 20:18:43,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860827315] [2021-11-25 20:18:43,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:43,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-25 20:18:43,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:43,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-25 20:18:43,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4468, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 20:18:43,677 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 66 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 20:18:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:45,664 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2021-11-25 20:18:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-25 20:18:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 112 [2021-11-25 20:18:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:45,665 INFO L225 Difference]: With dead ends: 113 [2021-11-25 20:18:45,665 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 20:18:45,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1804, Invalid=8498, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 20:18:45,669 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 204 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:45,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 0 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2752 Invalid, 0 Unknown, 57 Unchecked, 1.1s Time] [2021-11-25 20:18:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 20:18:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 20:18:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 20:18:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 20:18:45,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2021-11-25 20:18:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:45,670 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 20:18:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.0307692307692307) internal successors, (132), 65 states have internal predecessors, (132), 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 20:18:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 20:18:45,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 20:18:45,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-11-25 20:18:45,672 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-11-25 20:18:45,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-11-25 20:18:45,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-11-25 20:18:45,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-11-25 20:18:45,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-11-25 20:18:45,673 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-11-25 20:18:45,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:45,897 INFO L732 BasicCegarLoop]: Path program histogram: [53, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:45,899 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:18:45,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:18:45 BoogieIcfgContainer [2021-11-25 20:18:45,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:18:45,902 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:18:45,902 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:18:45,902 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:18:45,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:13:38" (3/4) ... [2021-11-25 20:18:45,905 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 20:18:45,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-11-25 20:18:45,914 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-25 20:18:45,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-25 20:18:45,915 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 20:18:45,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:18:45,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:18:45,946 INFO L158 Benchmark]: Toolchain (without parser) took 308245.43ms. Allocated memory was 107.0MB in the beginning and 281.0MB in the end (delta: 174.1MB). Free memory was 62.7MB in the beginning and 211.7MB in the end (delta: -149.0MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,947 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:18:45,947 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.90ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 74.7MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,947 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.33ms. Allocated memory is still 107.0MB. Free memory was 74.7MB in the beginning and 72.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,947 INFO L158 Benchmark]: Boogie Preprocessor took 53.77ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 71.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,948 INFO L158 Benchmark]: RCFGBuilder took 339.53ms. Allocated memory is still 107.0MB. Free memory was 71.7MB in the beginning and 59.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,948 INFO L158 Benchmark]: TraceAbstraction took 307223.30ms. Allocated memory was 107.0MB in the beginning and 281.0MB in the end (delta: 174.1MB). Free memory was 59.4MB in the beginning and 214.5MB in the end (delta: -155.1MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,948 INFO L158 Benchmark]: Witness Printer took 44.40ms. Allocated memory is still 281.0MB. Free memory was 214.5MB in the beginning and 211.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:18:45,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.90ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 74.7MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.33ms. Allocated memory is still 107.0MB. Free memory was 74.7MB in the beginning and 72.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.77ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 71.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 339.53ms. Allocated memory is still 107.0MB. Free memory was 71.7MB in the beginning and 59.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 307223.30ms. Allocated memory was 107.0MB in the beginning and 281.0MB in the end (delta: 174.1MB). Free memory was 59.4MB in the beginning and 214.5MB in the end (delta: -155.1MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * Witness Printer took 44.40ms. Allocated memory is still 281.0MB. Free memory was 214.5MB in the beginning and 211.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 307.1s, OverallIterations: 61, TraceHistogramMax: 27, PathProgramHistogramMax: 53, EmptinessCheckTime: 0.1s, AutomataDifference: 83.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5822 SdHoareTripleChecker+Valid, 39.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5822 mSDsluCounter, 907 SdHoareTripleChecker+Invalid, 33.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1072 IncrementalHoareTripleChecker+Unchecked, 1279 mSDsCounter, 5101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 110603 IncrementalHoareTripleChecker+Invalid, 116776 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5101 mSolverCounterUnsat, 64 mSDtfsCounter, 110603 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12400 GetRequests, 7001 SyntacticMatches, 98 SemanticMatches, 5301 ConstructedPredicates, 0 IntricatePredicates, 24 DeprecatedPredicates, 163835 ImplicationChecksByTransitivity, 181.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=60, InterpolantAutomatonStates: 2145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 61 MinimizatonAttempts, 89 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 23.2s SatisfiabilityAnalysisTime, 143.4s InterpolantComputationTime, 6400 NumberOfCodeBlocks, 6400 NumberOfCodeBlocksAsserted, 393 NumberOfCheckSat, 9416 ConstructedInterpolants, 171 QuantifiedInterpolants, 92232 SizeOfPredicates, 673 NumberOfNonLiveVariables, 20639 ConjunctsInSsa, 4901 ConjunctsInUnsatCore, 169 InterpolantComputations, 7 PerfectInterpolantSequences, 21628/80977 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-25 20:18:46,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_532013a4-8144-4e13-bfab-7fdd23cb06ec/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE