./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0 --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:42:57,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:42:57,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:42:57,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:42:57,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:42:57,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:42:57,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:42:57,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:42:57,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:42:57,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:42:57,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:42:57,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:42:57,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:42:57,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:42:57,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:42:57,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:42:57,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:42:57,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:42:57,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:42:57,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:42:57,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:42:57,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:42:57,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:42:57,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:42:57,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:42:57,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:42:57,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:42:57,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:42:57,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:42:57,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:42:57,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:42:57,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:42:57,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:42:57,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:42:57,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:42:57,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:42:57,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:42:57,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:42:57,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:42:57,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:42:57,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:42:57,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:42:57,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:42:57,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:42:57,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:42:57,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:42:57,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:42:57,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:42:57,428 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:42:57,428 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:42:57,428 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:42:57,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:42:57,430 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:42:57,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:42:57,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:42:57,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:42:57,431 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:42:57,431 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:42:57,431 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:42:57,432 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:42:57,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:42:57,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:42:57,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:42:57,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:42:57,435 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:42:57,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:42:57,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:42:57,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:42:57,445 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:42:57,445 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:42:57,445 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:42:57,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:42:57,446 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:42:57,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:42:57,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:42:57,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:42:57,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:42:57,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:42:57,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:42:57,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:42:57,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:42:57,448 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:42:57,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:42:57,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:42:57,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2022-11-16 19:42:57,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:42:57,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:42:57,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:42:57,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:42:57,746 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:42:57,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-16 19:42:57,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/data/d5777317c/21dcf5c6abf1440f8e9fe6019622bf63/FLAGa9ff9588d [2022-11-16 19:42:58,280 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:42:58,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-16 19:42:58,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/data/d5777317c/21dcf5c6abf1440f8e9fe6019622bf63/FLAGa9ff9588d [2022-11-16 19:42:58,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/data/d5777317c/21dcf5c6abf1440f8e9fe6019622bf63 [2022-11-16 19:42:58,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:42:58,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:42:58,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:58,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:42:58,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:42:58,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:58" (1/1) ... [2022-11-16 19:42:58,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d056c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:58, skipping insertion in model container [2022-11-16 19:42:58,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:58" (1/1) ... [2022-11-16 19:42:58,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:42:58,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:42:59,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:59,034 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:42:59,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:59,127 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:42:59,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59 WrapperNode [2022-11-16 19:42:59,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:59,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:59,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:42:59,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:42:59,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,185 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-16 19:42:59,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:59,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:42:59,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:42:59,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:42:59,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:42:59,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:42:59,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:42:59,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:42:59,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (1/1) ... [2022-11-16 19:42:59,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:42:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:59,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:42:59,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:42:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:42:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:42:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:42:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:42:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:42:59,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:42:59,449 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:42:59,451 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:42:59,599 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:42:59,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:42:59,687 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 19:42:59,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:59 BoogieIcfgContainer [2022-11-16 19:42:59,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:42:59,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:42:59,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:42:59,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:42:59,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:42:58" (1/3) ... [2022-11-16 19:42:59,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa200f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:59, skipping insertion in model container [2022-11-16 19:42:59,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:59" (2/3) ... [2022-11-16 19:42:59,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa200f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:59, skipping insertion in model container [2022-11-16 19:42:59,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:59" (3/3) ... [2022-11-16 19:42:59,714 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2022-11-16 19:42:59,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:42:59,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-16 19:42:59,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:42:59,800 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@337632dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:42:59,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 19:42:59,805 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) [2022-11-16 19:42:59,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:42:59,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:59,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:42:59,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:42:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash 88958, now seen corresponding path program 1 times [2022-11-16 19:42:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779540445] [2022-11-16 19:42:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:00,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:00,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779540445] [2022-11-16 19:43:00,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779540445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:00,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:00,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:43:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34649484] [2022-11-16 19:43:00,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:43:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:43:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:43:00,168 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) [2022-11-16 19:43:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:00,237 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-16 19:43:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:43:00,243 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 [2022-11-16 19:43:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:00,250 INFO L225 Difference]: With dead ends: 14 [2022-11-16 19:43:00,250 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 19:43:00,252 INFO L412 NwaCegarLoop]: 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 [2022-11-16 19:43:00,257 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:00,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 19:43:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 19:43:00,287 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) [2022-11-16 19:43:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-16 19:43:00,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2022-11-16 19:43:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:00,289 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-16 19:43:00,289 INFO L496 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) [2022-11-16 19:43:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-16 19:43:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:43:00,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:00,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:43:00,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:43:00,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash 88959, now seen corresponding path program 1 times [2022-11-16 19:43:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:00,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240772782] [2022-11-16 19:43:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:00,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:00,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240772782] [2022-11-16 19:43:00,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240772782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:00,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:00,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:43:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110025133] [2022-11-16 19:43:00,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:43:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:43:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:43:00,723 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) [2022-11-16 19:43:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:00,805 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-16 19:43:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:43:00,806 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 [2022-11-16 19:43:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:00,807 INFO L225 Difference]: With dead ends: 24 [2022-11-16 19:43:00,807 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 19:43:00,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:43:00,813 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 8 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 [2022-11-16 19:43:00,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 19:43:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-11-16 19:43:00,822 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) [2022-11-16 19:43:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-16 19:43:00,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2022-11-16 19:43:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:00,826 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-16 19:43:00,827 INFO L496 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) [2022-11-16 19:43:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-16 19:43:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:43:00,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:00,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:43:00,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:43:00,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 90363, now seen corresponding path program 1 times [2022-11-16 19:43:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:00,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801973619] [2022-11-16 19:43:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:01,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:01,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801973619] [2022-11-16 19:43:01,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801973619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:01,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:01,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:43:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554996939] [2022-11-16 19:43:01,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:01,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:43:01,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:43:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:43:01,043 INFO L87 Difference]: Start difference. First operand 15 states and 17 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) [2022-11-16 19:43:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:01,068 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-16 19:43:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:43:01,068 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 [2022-11-16 19:43:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:01,070 INFO L225 Difference]: With dead ends: 14 [2022-11-16 19:43:01,070 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 19:43:01,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:43:01,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:01,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 19:43:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 19:43:01,083 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) [2022-11-16 19:43:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-16 19:43:01,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2022-11-16 19:43:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:01,084 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-16 19:43:01,085 INFO L496 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) [2022-11-16 19:43:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-16 19:43:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:43:01,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:01,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:43:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:43:01,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2802126, now seen corresponding path program 1 times [2022-11-16 19:43:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:01,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44203950] [2022-11-16 19:43:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:01,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:01,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44203950] [2022-11-16 19:43:01,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44203950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:01,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:01,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:43:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36787883] [2022-11-16 19:43:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:43:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:43:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:43:01,139 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) [2022-11-16 19:43:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:01,157 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-16 19:43:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:43:01,157 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 [2022-11-16 19:43:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:01,158 INFO L225 Difference]: With dead ends: 13 [2022-11-16 19:43:01,158 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 19:43:01,158 INFO L412 NwaCegarLoop]: 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 [2022-11-16 19:43:01,159 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 2 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 [2022-11-16 19:43:01,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 19:43:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 19:43:01,162 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) [2022-11-16 19:43:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-16 19:43:01,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2022-11-16 19:43:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:01,163 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-16 19:43:01,163 INFO L496 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) [2022-11-16 19:43:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-16 19:43:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:43:01,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:01,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:43:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:43:01,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2802127, now seen corresponding path program 1 times [2022-11-16 19:43:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211479674] [2022-11-16 19:43:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:01,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:01,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211479674] [2022-11-16 19:43:01,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211479674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:01,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:01,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:43:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800217612] [2022-11-16 19:43:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:01,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:43:01,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:43:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:43:01,244 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) [2022-11-16 19:43:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:01,275 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-16 19:43:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:43:01,276 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 [2022-11-16 19:43:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:01,276 INFO L225 Difference]: With dead ends: 18 [2022-11-16 19:43:01,276 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 19:43:01,277 INFO L412 NwaCegarLoop]: 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 [2022-11-16 19:43:01,278 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:01,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 19:43:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-16 19:43:01,281 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) [2022-11-16 19:43:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-16 19:43:01,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2022-11-16 19:43:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:01,282 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-16 19:43:01,282 INFO L496 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) [2022-11-16 19:43:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-16 19:43:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:43:01,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:01,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-16 19:43:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:43:01,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash 85522820, now seen corresponding path program 1 times [2022-11-16 19:43:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:01,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349803737] [2022-11-16 19:43:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:01,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:01,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:01,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349803737] [2022-11-16 19:43:01,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349803737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104655287] [2022-11-16 19:43:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:01,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:01,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:01,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:43:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:43:01,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:01,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:43:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:01,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104655287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168339112] [2022-11-16 19:43:02,144 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-16 19:43:02,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:02,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:02,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:02,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:02,209 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:02,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:02,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:02,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:02,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:02,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |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|) (<= |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 [2022-11-16 19:43:02,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:02,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:02,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-16 19:43:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540875016] [2022-11-16 19:43:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:02,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:43:02,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:43:02,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:43:02,641 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-16 19:43:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:02,847 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-16 19:43:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:43:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) Word has length 5 [2022-11-16 19:43:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:02,849 INFO L225 Difference]: With dead ends: 30 [2022-11-16 19:43:02,849 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 19:43:02,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:43:02,850 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:02,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:02,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 19:43:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 11. [2022-11-16 19:43:02,852 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) [2022-11-16 19:43:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-16 19:43:02,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2022-11-16 19:43:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-16 19:43:02,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-16 19:43:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-16 19:43:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:43:02,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:02,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:43:02,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:03,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:03,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1602123832, now seen corresponding path program 1 times [2022-11-16 19:43:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750071665] [2022-11-16 19:43:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:03,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750071665] [2022-11-16 19:43:03,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750071665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:03,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:03,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:43:03,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893298600] [2022-11-16 19:43:03,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:03,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:43:03,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:03,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:43:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:43:03,293 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) [2022-11-16 19:43:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:03,369 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-16 19:43:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:43:03,370 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 [2022-11-16 19:43:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:03,370 INFO L225 Difference]: With dead ends: 19 [2022-11-16 19:43:03,371 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 19:43:03,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:43:03,372 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:03,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 19:43:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-16 19:43:03,374 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) [2022-11-16 19:43:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-16 19:43:03,375 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2022-11-16 19:43:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:03,375 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-16 19:43:03,376 INFO L496 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) [2022-11-16 19:43:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-16 19:43:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:43:03,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:03,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:03,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 19:43:03,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1873767508, now seen corresponding path program 1 times [2022-11-16 19:43:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:03,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502600483] [2022-11-16 19:43:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:03,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:03,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502600483] [2022-11-16 19:43:03,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502600483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:03,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:43:03,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:43:03,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415358285] [2022-11-16 19:43:03,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:03,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:43:03,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:03,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:43:03,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:43:03,471 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) [2022-11-16 19:43:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:03,488 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-16 19:43:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:43:03,489 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 [2022-11-16 19:43:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:03,489 INFO L225 Difference]: With dead ends: 14 [2022-11-16 19:43:03,489 INFO L226 Difference]: Without dead ends: 9 [2022-11-16 19:43:03,489 INFO L412 NwaCegarLoop]: 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 [2022-11-16 19:43:03,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 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 [2022-11-16 19:43:03,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-16 19:43:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-16 19:43:03,493 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) [2022-11-16 19:43:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-16 19:43:03,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-16 19:43:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:03,495 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-16 19:43:03,495 INFO L496 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) [2022-11-16 19:43:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-16 19:43:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:43:03,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:03,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:43:03,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash 937389987, now seen corresponding path program 1 times [2022-11-16 19:43:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:03,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146957678] [2022-11-16 19:43:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:03,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146957678] [2022-11-16 19:43:03,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146957678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:03,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96035358] [2022-11-16 19:43:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:03,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:03,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:03,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:43:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:43:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:03,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:03,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:03,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96035358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108023703] [2022-11-16 19:43:03,981 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:03,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:03,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:03,982 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:03,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:04,006 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:04,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:04,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:04,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:04,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:04,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(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 [2022-11-16 19:43:04,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:04,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:04,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-16 19:43:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825778396] [2022-11-16 19:43:04,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:04,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:43:04,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:43:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-16 19:43:04,719 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:04,827 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-16 19:43:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:43:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:43:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:04,828 INFO L225 Difference]: With dead ends: 13 [2022-11-16 19:43:04,828 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 19:43:04,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:43:04,829 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:04,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:43:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 19:43:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-11-16 19:43:04,831 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) [2022-11-16 19:43:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-16 19:43:04,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-16 19:43:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:04,832 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-16 19:43:04,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-16 19:43:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:43:04,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:04,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:04,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:05,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:05,035 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1111355236, now seen corresponding path program 2 times [2022-11-16 19:43:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:05,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607384772] [2022-11-16 19:43:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:05,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:05,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607384772] [2022-11-16 19:43:05,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607384772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:05,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863455093] [2022-11-16 19:43:05,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:05,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:05,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:05,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:43:05,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:43:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:05,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 19:43:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:05,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:05,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:05,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:05,803 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:05,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863455093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838081022] [2022-11-16 19:43:05,907 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:05,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:05,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:05,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:05,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:05,928 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:05,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:06,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:06,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:06,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:06,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '519#(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 [2022-11-16 19:43:06,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:06,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:06,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-11-16 19:43:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124848827] [2022-11-16 19:43:06,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:43:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:43:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:43:06,863 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:07,185 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-16 19:43:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:43:07,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:43:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:07,186 INFO L225 Difference]: With dead ends: 19 [2022-11-16 19:43:07,186 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 19:43:07,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-16 19:43:07,187 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:07,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 10 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 19:43:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-16 19:43:07,188 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) [2022-11-16 19:43:07,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-16 19:43:07,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2022-11-16 19:43:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:07,189 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-16 19:43:07,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:07,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-16 19:43:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:43:07,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:07,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2022-11-16 19:43:07,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:07,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 19:43:07,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 568496887, now seen corresponding path program 3 times [2022-11-16 19:43:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:07,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845321179] [2022-11-16 19:43:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:07,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845321179] [2022-11-16 19:43:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845321179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615884852] [2022-11-16 19:43:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:07,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:07,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:07,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:43:07,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:07,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 19:43:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:07,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:08,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615884852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:08,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570929182] [2022-11-16 19:43:08,055 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:08,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:08,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:08,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:08,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:08,072 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:08,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:08,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:08,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:08,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:08,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:08,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(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 [2022-11-16 19:43:08,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:08,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:08,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-16 19:43:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389184437] [2022-11-16 19:43:08,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:08,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:43:08,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:43:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:43:08,703 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:08,869 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-16 19:43:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:43:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:43:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:08,870 INFO L225 Difference]: With dead ends: 16 [2022-11-16 19:43:08,870 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:43:08,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-11-16 19:43:08,871 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:08,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:43:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-16 19:43:08,873 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) [2022-11-16 19:43:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-16 19:43:08,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-11-16 19:43:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:08,874 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-16 19:43:08,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-16 19:43:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:43:08,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:08,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-11-16 19:43:08,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 19:43:09,080 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 864661232, now seen corresponding path program 4 times [2022-11-16 19:43:09,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:09,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765108424] [2022-11-16 19:43:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:09,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765108424] [2022-11-16 19:43:09,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765108424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182101091] [2022-11-16 19:43:09,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:09,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:09,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:43:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:43:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:09,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:09,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:09,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:09,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:09,850 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-11-16 19:43:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:10,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182101091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213032993] [2022-11-16 19:43:10,097 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:10,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:10,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:10,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:10,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:10,119 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:10,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:10,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:10,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:10,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:10,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '808#(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 [2022-11-16 19:43:10,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:10,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:10,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-11-16 19:43:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341979598] [2022-11-16 19:43:10,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 19:43:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 19:43:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:43:10,859 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2022-11-16 19:43:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:11,142 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-16 19:43:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:43:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 14 [2022-11-16 19:43:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:11,143 INFO L225 Difference]: With dead ends: 25 [2022-11-16 19:43:11,143 INFO L226 Difference]: Without dead ends: 18 [2022-11-16 19:43:11,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 19:43:11,145 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:11,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-16 19:43:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-16 19:43:11,146 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) [2022-11-16 19:43:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-16 19:43:11,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-11-16 19:43:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:11,147 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-16 19:43:11,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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) [2022-11-16 19:43:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-16 19:43:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:43:11,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:11,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2022-11-16 19:43:11,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 19:43:11,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1264874549, now seen corresponding path program 5 times [2022-11-16 19:43:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468157033] [2022-11-16 19:43:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:11,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:11,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468157033] [2022-11-16 19:43:11,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468157033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:11,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201469349] [2022-11-16 19:43:11,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:11,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:11,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:11,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:11,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:43:11,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 19:43:11,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:43:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:12,175 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:43:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:12,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201469349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:12,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831844950] [2022-11-16 19:43:12,244 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:12,245 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:12,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:12,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:12,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:12,262 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:12,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:12,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:12,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:12,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '984#(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 [2022-11-16 19:43:12,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:12,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:12,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-11-16 19:43:12,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902486742] [2022-11-16 19:43:12,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:12,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:43:12,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:43:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:43:12,949 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-16 19:43:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:13,234 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-16 19:43:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:43:13,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) Word has length 16 [2022-11-16 19:43:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:13,235 INFO L225 Difference]: With dead ends: 20 [2022-11-16 19:43:13,235 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 19:43:13,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 19:43:13,236 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 19:43:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-16 19:43:13,238 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) [2022-11-16 19:43:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-16 19:43:13,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-11-16 19:43:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:13,239 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-16 19:43:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-16 19:43:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-16 19:43:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:43:13,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:13,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-16 19:43:13,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:13,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 19:43:13,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -68697404, now seen corresponding path program 6 times [2022-11-16 19:43:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:13,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644572816] [2022-11-16 19:43:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:13,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644572816] [2022-11-16 19:43:13,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644572816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:13,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392309102] [2022-11-16 19:43:13,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:13,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:13,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:13,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:13,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:43:13,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:13,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:43:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:14,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:14,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:14,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:14,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:14,218 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:14,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392309102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395454378] [2022-11-16 19:43:14,339 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:14,339 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:14,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:14,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:14,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:14,352 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:14,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:14,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:14,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:14,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:15,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1166#(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 [2022-11-16 19:43:15,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:15,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:15,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-16 19:43:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359029824] [2022-11-16 19:43:15,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:15,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:43:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:43:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:43:15,070 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) [2022-11-16 19:43:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:15,439 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-16 19:43:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:43:15,440 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 [2022-11-16 19:43:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:15,441 INFO L225 Difference]: With dead ends: 31 [2022-11-16 19:43:15,441 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 19:43:15,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 19:43:15,442 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:15,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 10 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:15,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 19:43:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-16 19:43:15,444 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) [2022-11-16 19:43:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-16 19:43:15,447 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-11-16 19:43:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:15,448 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-16 19:43:15,448 INFO L496 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) [2022-11-16 19:43:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-16 19:43:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:43:15,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:15,449 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2022-11-16 19:43:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:15,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:43:15,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:15,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1262896609, now seen corresponding path program 7 times [2022-11-16 19:43:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:15,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307717067] [2022-11-16 19:43:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:16,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307717067] [2022-11-16 19:43:16,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307717067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:16,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931478485] [2022-11-16 19:43:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:16,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:16,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:16,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:43:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:43:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:16,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:16,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:16,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931478485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:16,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466025214] [2022-11-16 19:43:16,621 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:16,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:16,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:16,622 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:16,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:16,633 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:16,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:16,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:16,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:16,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:17,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1386#(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 [2022-11-16 19:43:17,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:17,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:17,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-11-16 19:43:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739887341] [2022-11-16 19:43:17,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:17,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 19:43:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 19:43:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 19:43:17,328 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-11-16 19:43:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:17,621 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-16 19:43:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:43:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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 20 [2022-11-16 19:43:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:17,623 INFO L225 Difference]: With dead ends: 24 [2022-11-16 19:43:17,623 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 19:43:17,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 19:43:17,624 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:17,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 19:43:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-16 19:43:17,633 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) [2022-11-16 19:43:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-16 19:43:17,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-11-16 19:43:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:17,635 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-16 19:43:17,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 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) [2022-11-16 19:43:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-16 19:43:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:43:17,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:17,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2022-11-16 19:43:17,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:17,843 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:17,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1832102936, now seen corresponding path program 8 times [2022-11-16 19:43:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:17,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621081190] [2022-11-16 19:43:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:18,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621081190] [2022-11-16 19:43:18,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621081190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855995600] [2022-11-16 19:43:18,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:18,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:18,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:43:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:43:18,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 19:43:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:18,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:18,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:18,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:18,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:18,707 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:18,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855995600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286583240] [2022-11-16 19:43:18,835 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:18,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:18,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:18,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:18,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:18,848 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:18,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:18,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:18,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:19,007 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:19,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1605#(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 [2022-11-16 19:43:19,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:19,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:19,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-11-16 19:43:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874118490] [2022-11-16 19:43:19,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 19:43:19,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 19:43:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-11-16 19:43:19,747 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) [2022-11-16 19:43:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:20,228 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-11-16 19:43:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 19:43:20,228 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 [2022-11-16 19:43:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:20,229 INFO L225 Difference]: With dead ends: 37 [2022-11-16 19:43:20,229 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 19:43:20,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 19:43:20,231 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:20,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:43:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 19:43:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-16 19:43:20,233 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) [2022-11-16 19:43:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-16 19:43:20,234 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-11-16 19:43:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:20,234 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-16 19:43:20,235 INFO L496 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) [2022-11-16 19:43:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-16 19:43:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:43:20,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:20,235 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2022-11-16 19:43:20,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 19:43:20,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -214663693, now seen corresponding path program 9 times [2022-11-16 19:43:20,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332289282] [2022-11-16 19:43:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:20,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332289282] [2022-11-16 19:43:20,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332289282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943641766] [2022-11-16 19:43:20,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:20,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:20,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:20,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:43:21,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:21,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 19:43:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:21,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:21,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:21,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943641766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:21,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351990975] [2022-11-16 19:43:21,659 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:21,659 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:21,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:21,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:21,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:21,674 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:21,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:21,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:21,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:21,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:21,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:22,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(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 [2022-11-16 19:43:22,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:22,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:22,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-16 19:43:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269257109] [2022-11-16 19:43:22,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 19:43:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 19:43:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 19:43:22,320 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:22,749 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-16 19:43:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 19:43:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2022-11-16 19:43:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:22,750 INFO L225 Difference]: With dead ends: 28 [2022-11-16 19:43:22,750 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 19:43:22,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1948, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 19:43:22,752 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:22,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:43:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 19:43:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-16 19:43:22,754 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) [2022-11-16 19:43:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-16 19:43:22,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-11-16 19:43:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:22,755 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-16 19:43:22,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-16 19:43:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 19:43:22,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:22,756 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2022-11-16 19:43:22,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:43:22,957 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -133379348, now seen corresponding path program 10 times [2022-11-16 19:43:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:22,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396428602] [2022-11-16 19:43:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:23,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:23,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396428602] [2022-11-16 19:43:23,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396428602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430256735] [2022-11-16 19:43:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:23,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:23,423 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:23,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:43:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 19:43:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:23,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:23,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:23,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:23,862 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:24,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430256735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409665363] [2022-11-16 19:43:24,004 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:24,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:24,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:24,004 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:24,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:24,021 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:24,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:24,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:24,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:24,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:24,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2124#(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 [2022-11-16 19:43:24,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:24,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:24,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-11-16 19:43:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497638346] [2022-11-16 19:43:24,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:24,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 19:43:24,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 19:43:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 19:43:24,752 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) [2022-11-16 19:43:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:25,359 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-11-16 19:43:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:43:25,360 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 [2022-11-16 19:43:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:25,360 INFO L225 Difference]: With dead ends: 43 [2022-11-16 19:43:25,360 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 19:43:25,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 19:43:25,362 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:25,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 431 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-16 19:43:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 19:43:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-16 19:43:25,364 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) [2022-11-16 19:43:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-16 19:43:25,364 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-11-16 19:43:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:25,365 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-16 19:43:25,365 INFO L496 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) [2022-11-16 19:43:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-16 19:43:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 19:43:25,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:25,366 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2022-11-16 19:43:25,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 19:43:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:25,571 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 189478727, now seen corresponding path program 11 times [2022-11-16 19:43:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:25,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157364261] [2022-11-16 19:43:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:26,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157364261] [2022-11-16 19:43:26,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157364261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706972059] [2022-11-16 19:43:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:26,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:26,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:26,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:43:26,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 19:43:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:43:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:26,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:26,806 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:43:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:26,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706972059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:26,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364041387] [2022-11-16 19:43:26,932 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:26,932 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:26,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:26,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:26,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:26,944 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:26,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:27,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:27,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:27,090 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:27,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2429#(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 [2022-11-16 19:43:27,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:27,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:27,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-11-16 19:43:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103746930] [2022-11-16 19:43:27,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:27,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 19:43:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 19:43:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 19:43:27,617 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) [2022-11-16 19:43:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:28,004 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-11-16 19:43:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 19:43:28,005 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 [2022-11-16 19:43:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:28,006 INFO L225 Difference]: With dead ends: 32 [2022-11-16 19:43:28,006 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 19:43:28,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 19:43:28,007 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:28,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:43:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 19:43:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-16 19:43:28,009 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) [2022-11-16 19:43:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-16 19:43:28,010 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-11-16 19:43:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:28,010 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-16 19:43:28,010 INFO L496 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) [2022-11-16 19:43:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-16 19:43:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:43:28,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:28,011 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2022-11-16 19:43:28,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:28,212 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429632, now seen corresponding path program 12 times [2022-11-16 19:43:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911494422] [2022-11-16 19:43:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:28,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:28,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:28,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911494422] [2022-11-16 19:43:28,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911494422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:28,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032630647] [2022-11-16 19:43:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:28,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:28,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:28,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:43:28,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:28,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 19:43:28,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:29,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:29,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:29,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:29,323 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:29,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032630647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:29,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217920500] [2022-11-16 19:43:29,478 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:29,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:29,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:29,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:29,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:29,490 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:29,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:29,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:29,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:29,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:29,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:30,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2722#(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 [2022-11-16 19:43:30,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:30,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:30,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-11-16 19:43:30,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664882889] [2022-11-16 19:43:30,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:30,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 19:43:30,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 19:43:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 19:43:30,170 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) [2022-11-16 19:43:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:30,915 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-16 19:43:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 19:43:30,916 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 [2022-11-16 19:43:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:30,917 INFO L225 Difference]: With dead ends: 49 [2022-11-16 19:43:30,917 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 19:43:30,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:43:30,919 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:30,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 22 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:43:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 19:43:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-16 19:43:30,921 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) [2022-11-16 19:43:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-16 19:43:30,922 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-11-16 19:43:30,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:30,922 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-16 19:43:30,922 INFO L496 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) [2022-11-16 19:43:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-16 19:43:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 19:43:30,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:30,923 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2022-11-16 19:43:30,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:31,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:31,129 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:31,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1601878501, now seen corresponding path program 13 times [2022-11-16 19:43:31,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262636324] [2022-11-16 19:43:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:31,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:31,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262636324] [2022-11-16 19:43:31,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262636324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291246806] [2022-11-16 19:43:31,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:31,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:31,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:43:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 19:43:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:31,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:32,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:32,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291246806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993268869] [2022-11-16 19:43:32,789 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:32,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:32,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:32,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:32,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:32,801 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:32,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:32,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:32,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:32,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:32,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:33,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3071#(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 [2022-11-16 19:43:33,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:33,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:33,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-11-16 19:43:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817385948] [2022-11-16 19:43:33,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:33,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 19:43:33,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 19:43:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 19:43:33,523 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 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) [2022-11-16 19:43:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:34,138 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-16 19:43:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 19:43:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 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 32 [2022-11-16 19:43:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:34,139 INFO L225 Difference]: With dead ends: 36 [2022-11-16 19:43:34,139 INFO L226 Difference]: Without dead ends: 36 [2022-11-16 19:43:34,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=630, Invalid=3030, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 19:43:34,141 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:34,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:43:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-16 19:43:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-16 19:43:34,143 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) [2022-11-16 19:43:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-16 19:43:34,144 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-11-16 19:43:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:34,144 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-16 19:43:34,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 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) [2022-11-16 19:43:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-16 19:43:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 19:43:34,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:34,145 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2022-11-16 19:43:34,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:34,346 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1806948076, now seen corresponding path program 14 times [2022-11-16 19:43:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:34,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030879476] [2022-11-16 19:43:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:34,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030879476] [2022-11-16 19:43:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030879476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674353490] [2022-11-16 19:43:34,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:35,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:35,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:43:35,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-16 19:43:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 19:43:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:35,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:35,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:35,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:35,603 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:35,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674353490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465649420] [2022-11-16 19:43:35,767 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:35,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:35,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:35,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:35,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:35,785 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:35,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:35,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:35,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:35,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:35,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:36,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3401#(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 [2022-11-16 19:43:36,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:36,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:36,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-11-16 19:43:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865906899] [2022-11-16 19:43:36,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:36,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 19:43:36,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 19:43:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 19:43:36,483 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) [2022-11-16 19:43:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:37,376 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-16 19:43:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 19:43:37,379 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 [2022-11-16 19:43:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:37,380 INFO L225 Difference]: With dead ends: 55 [2022-11-16 19:43:37,380 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 19:43:37,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 19:43:37,382 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:37,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 18 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 800 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-16 19:43:37,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 19:43:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-16 19:43:37,384 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) [2022-11-16 19:43:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-16 19:43:37,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-11-16 19:43:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:37,385 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-16 19:43:37,386 INFO L496 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) [2022-11-16 19:43:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-16 19:43:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 19:43:37,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:37,387 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1] [2022-11-16 19:43:37,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:37,591 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 481430127, now seen corresponding path program 15 times [2022-11-16 19:43:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:37,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504563134] [2022-11-16 19:43:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:38,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504563134] [2022-11-16 19:43:38,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504563134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220420936] [2022-11-16 19:43:38,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:38,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:38,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:38,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:38,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:43:38,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 19:43:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:38,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:39,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220420936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994975898] [2022-11-16 19:43:39,381 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:39,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:39,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:39,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:39,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:39,394 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:39,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:39,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:39,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:39,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:40,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3793#(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 [2022-11-16 19:43:40,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:40,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:40,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-11-16 19:43:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228941611] [2022-11-16 19:43:40,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 19:43:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 19:43:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2701, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 19:43:40,155 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:40,719 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-16 19:43:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:43:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2022-11-16 19:43:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:40,720 INFO L225 Difference]: With dead ends: 40 [2022-11-16 19:43:40,720 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 19:43:40,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=764, Invalid=3658, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 19:43:40,722 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 174 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:40,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:43:40,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 19:43:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-16 19:43:40,725 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) [2022-11-16 19:43:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-16 19:43:40,726 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-11-16 19:43:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:40,726 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-16 19:43:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-16 19:43:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 19:43:40,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:40,727 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2022-11-16 19:43:40,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:40,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:43:40,933 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1202116504, now seen corresponding path program 16 times [2022-11-16 19:43:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:40,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453123904] [2022-11-16 19:43:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:41,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:41,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453123904] [2022-11-16 19:43:41,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453123904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:41,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179036041] [2022-11-16 19:43:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:41,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:41,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:41,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:43:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 19:43:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:41,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:42,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:42,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:42,939 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2022-11-16 19:43:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:43,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:43,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:43,999 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-11-16 19:43:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:44,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179036041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:44,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292782029] [2022-11-16 19:43:44,625 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:44,625 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:44,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:44,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:44,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:44,639 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:44,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:44,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:44,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:44,760 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:45,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4187#(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 [2022-11-16 19:43:45,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:45,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:45,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 64 [2022-11-16 19:43:45,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702792779] [2022-11-16 19:43:45,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 19:43:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 19:43:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4559, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 19:43:45,657 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 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) [2022-11-16 19:43:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:47,064 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-16 19:43:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 19:43:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 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) Word has length 38 [2022-11-16 19:43:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:47,065 INFO L225 Difference]: With dead ends: 64 [2022-11-16 19:43:47,065 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 19:43:47,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=673, Invalid=6809, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 19:43:47,067 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:47,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 5 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 564 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-11-16 19:43:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 19:43:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-11-16 19:43:47,070 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) [2022-11-16 19:43:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-16 19:43:47,070 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-11-16 19:43:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:47,070 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-16 19:43:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 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) [2022-11-16 19:43:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-16 19:43:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 19:43:47,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:47,077 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2022-11-16 19:43:47,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:47,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:47,277 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash 390126908, now seen corresponding path program 17 times [2022-11-16 19:43:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285118812] [2022-11-16 19:43:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:48,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285118812] [2022-11-16 19:43:48,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285118812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636680762] [2022-11-16 19:43:48,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:48,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:48,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:48,143 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:48,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 19:43:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 19:43:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:48,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 19:43:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:48,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:48,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:43:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:48,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:48,984 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:43:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:49,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636680762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:49,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551687674] [2022-11-16 19:43:49,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:49,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:49,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:49,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:49,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:49,183 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:49,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:49,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:49,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:49,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:49,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:49,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4626#(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 [2022-11-16 19:43:49,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:49,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:49,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-11-16 19:43:49,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769801309] [2022-11-16 19:43:49,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:49,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 19:43:49,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:49,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 19:43:49,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 19:43:49,944 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) [2022-11-16 19:43:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:51,191 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-11-16 19:43:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:43:51,192 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 [2022-11-16 19:43:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:51,195 INFO L225 Difference]: With dead ends: 67 [2022-11-16 19:43:51,195 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 19:43:51,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=301, Invalid=4255, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 19:43:51,197 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:51,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 22 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1129 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-16 19:43:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 19:43:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-16 19:43:51,202 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) [2022-11-16 19:43:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-16 19:43:51,202 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-11-16 19:43:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:51,203 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-16 19:43:51,203 INFO L496 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) [2022-11-16 19:43:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-16 19:43:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:43:51,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:51,204 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2022-11-16 19:43:51,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 19:43:51,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 19:43:51,410 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1149842327, now seen corresponding path program 18 times [2022-11-16 19:43:51,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:51,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568847888] [2022-11-16 19:43:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:52,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568847888] [2022-11-16 19:43:52,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568847888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:52,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138393611] [2022-11-16 19:43:52,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:52,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:52,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:52,166 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:52,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:43:52,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 19:43:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:52,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:53,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138393611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:53,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430227227] [2022-11-16 19:43:53,714 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:43:53,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:43:53,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:43:53,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:43:53,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:43:53,725 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:43:53,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:43:53,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:53,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:53,861 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:43:54,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5104#(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 [2022-11-16 19:43:54,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:43:54,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:43:54,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-11-16 19:43:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346545112] [2022-11-16 19:43:54,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:54,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 19:43:54,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 19:43:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3762, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 19:43:54,745 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 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) [2022-11-16 19:43:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:55,546 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-16 19:43:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 19:43:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 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 44 [2022-11-16 19:43:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:55,547 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:43:55,547 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 19:43:55,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1074, Invalid=5088, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 19:43:55,548 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 201 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:55,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 2 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:43:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 19:43:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-16 19:43:55,550 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) [2022-11-16 19:43:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-16 19:43:55,551 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-11-16 19:43:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:55,551 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-16 19:43:55,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 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) [2022-11-16 19:43:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-16 19:43:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:43:55,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:55,552 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2022-11-16 19:43:55,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 19:43:55,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:43:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1191880592, now seen corresponding path program 19 times [2022-11-16 19:43:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:55,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450473061] [2022-11-16 19:43:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:56,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450473061] [2022-11-16 19:43:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450473061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401485613] [2022-11-16 19:43:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:43:56,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:56,669 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:56,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 19:43:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:56,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 19:43:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:56,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:57,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:43:58,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:58,265 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 19 [2022-11-16 19:43:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:58,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:59,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:43:59,517 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-11-16 19:44:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:00,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401485613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911835821] [2022-11-16 19:44:00,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:00,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:00,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:00,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:00,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:00,361 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:00,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:00,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:00,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:00,523 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:01,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5578#(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 [2022-11-16 19:44:01,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:01,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:01,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 76 [2022-11-16 19:44:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35134516] [2022-11-16 19:44:01,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-16 19:44:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-16 19:44:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=6253, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 19:44:01,377 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:03,495 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-16 19:44:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 19:44:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 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 [2022-11-16 19:44:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:03,497 INFO L225 Difference]: With dead ends: 76 [2022-11-16 19:44:03,497 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 19:44:03,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=874, Invalid=9226, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 19:44:03,498 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:03,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 860 Invalid, 0 Unknown, 138 Unchecked, 0.5s Time] [2022-11-16 19:44:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 19:44:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-16 19:44:03,501 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) [2022-11-16 19:44:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-16 19:44:03,501 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-16 19:44:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:03,502 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-16 19:44:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-16 19:44:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 19:44:03,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:03,503 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2022-11-16 19:44:03,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:03,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 19:44:03,709 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -335157404, now seen corresponding path program 20 times [2022-11-16 19:44:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:03,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504407414] [2022-11-16 19:44:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:04,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:04,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504407414] [2022-11-16 19:44:04,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504407414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884590825] [2022-11-16 19:44:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:44:04,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:04,764 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:04,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 19:44:05,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 19:44:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 19:44:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:05,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:05,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:44:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:05,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:05,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:44:05,753 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:44:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:05,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884590825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:05,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495496430] [2022-11-16 19:44:05,973 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:05,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:05,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:05,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:05,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:05,989 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:06,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:44:06,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:06,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:06,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:07,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6097#(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 [2022-11-16 19:44:07,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:07,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:07,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2022-11-16 19:44:07,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633082874] [2022-11-16 19:44:07,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 19:44:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:07,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 19:44:07,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:44:07,065 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) [2022-11-16 19:44:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:08,685 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-16 19:44:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 19:44:08,686 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 [2022-11-16 19:44:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:08,687 INFO L225 Difference]: With dead ends: 79 [2022-11-16 19:44:08,687 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 19:44:08,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=345, Invalid=5661, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 19:44:08,688 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:08,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1543 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-16 19:44:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 19:44:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-16 19:44:08,691 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) [2022-11-16 19:44:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-16 19:44:08,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-11-16 19:44:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:08,692 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-16 19:44:08,692 INFO L496 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) [2022-11-16 19:44:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-16 19:44:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 19:44:08,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:08,693 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1] [2022-11-16 19:44:08,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 19:44:08,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 19:44:08,899 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 49001151, now seen corresponding path program 21 times [2022-11-16 19:44:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:08,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258349473] [2022-11-16 19:44:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:08,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:10,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258349473] [2022-11-16 19:44:10,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258349473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:10,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661915776] [2022-11-16 19:44:10,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:44:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:10,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:10,028 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:10,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:44:10,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:44:10,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:10,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-16 19:44:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:10,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:44:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:10,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661915776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817526091] [2022-11-16 19:44:12,155 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:12,156 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:12,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:12,156 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:12,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:12,167 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:12,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:12,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:12,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:12,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:12,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6661#(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 [2022-11-16 19:44:12,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:12,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:12,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 68 [2022-11-16 19:44:12,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219181102] [2022-11-16 19:44:12,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:12,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-16 19:44:12,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-16 19:44:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=4995, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 19:44:12,971 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:14,084 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-16 19:44:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 19:44:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 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 [2022-11-16 19:44:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:14,085 INFO L225 Difference]: With dead ends: 56 [2022-11-16 19:44:14,085 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 19:44:14,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1440, Invalid=6750, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 19:44:14,088 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 419 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:14,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 0 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:44:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 19:44:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-16 19:44:14,090 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) [2022-11-16 19:44:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-16 19:44:14,091 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-11-16 19:44:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:14,091 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-16 19:44:14,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-16 19:44:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 19:44:14,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:14,093 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2022-11-16 19:44:14,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:14,299 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash -154534728, now seen corresponding path program 22 times [2022-11-16 19:44:14,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012344148] [2022-11-16 19:44:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:14,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:15,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012344148] [2022-11-16 19:44:15,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012344148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834730844] [2022-11-16 19:44:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:44:15,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:15,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:15,475 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:15,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 19:44:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 19:44:15,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:16,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:16,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:44:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:16,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:44:16,382 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:44:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:16,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834730844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:16,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012075266] [2022-11-16 19:44:16,591 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:16,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:16,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:16,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:16,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:16,607 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:16,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:16,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:16,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:16,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:16,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:17,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7176#(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 [2022-11-16 19:44:17,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:17,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:17,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2022-11-16 19:44:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097113916] [2022-11-16 19:44:17,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 19:44:17,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:17,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 19:44:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 19:44:17,423 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) [2022-11-16 19:44:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:19,225 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-16 19:44:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 19:44:19,226 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 [2022-11-16 19:44:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:19,226 INFO L225 Difference]: With dead ends: 85 [2022-11-16 19:44:19,226 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 19:44:19,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=367, Invalid=6439, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 19:44:19,227 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 111 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:19,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1708 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-16 19:44:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 19:44:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-16 19:44:19,229 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) [2022-11-16 19:44:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-16 19:44:19,230 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-11-16 19:44:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-16 19:44:19,231 INFO L496 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) [2022-11-16 19:44:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-16 19:44:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 19:44:19,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:19,232 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1] [2022-11-16 19:44:19,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:19,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:19,438 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:19,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1154785939, now seen corresponding path program 23 times [2022-11-16 19:44:19,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:19,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451574802] [2022-11-16 19:44:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 121 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:20,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451574802] [2022-11-16 19:44:20,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451574802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762840236] [2022-11-16 19:44:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:44:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:20,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:20,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 19:44:20,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-16 19:44:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 19:44:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:21,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:22,791 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:44:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:23,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762840236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778260748] [2022-11-16 19:44:23,180 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:23,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:23,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:23,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:23,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:23,195 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:23,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:44:23,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:23,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:23,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:24,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7782#(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 [2022-11-16 19:44:24,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:24,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:24,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 72 [2022-11-16 19:44:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803678237] [2022-11-16 19:44:24,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 19:44:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 19:44:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=5424, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:44:24,057 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:25,094 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-16 19:44:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 19:44:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 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 [2022-11-16 19:44:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:25,096 INFO L225 Difference]: With dead ends: 60 [2022-11-16 19:44:25,096 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:44:25,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 102 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3503 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 19:44:25,097 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 303 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:25,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 0 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:44:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:44:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-11-16 19:44:25,099 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) [2022-11-16 19:44:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-16 19:44:25,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-11-16 19:44:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:25,100 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-16 19:44:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-16 19:44:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 19:44:25,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:25,101 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2022-11-16 19:44:25,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:25,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 19:44:25,307 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1647724428, now seen corresponding path program 24 times [2022-11-16 19:44:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:25,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859053130] [2022-11-16 19:44:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:26,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:26,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859053130] [2022-11-16 19:44:26,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859053130] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:26,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824559655] [2022-11-16 19:44:26,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:44:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:26,541 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:26,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:44:26,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:44:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-16 19:44:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:27,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:27,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:44:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:27,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:44:27,726 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:44:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:27,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824559655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266765878] [2022-11-16 19:44:27,954 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:27,954 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:27,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:27,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:27,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:27,966 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:27,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:28,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:28,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:28,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:28,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:28,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8334#(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 [2022-11-16 19:44:28,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:28,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:28,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2022-11-16 19:44:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194555810] [2022-11-16 19:44:28,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 19:44:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 19:44:28,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 19:44:28,798 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) [2022-11-16 19:44:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:30,874 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-16 19:44:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 19:44:30,874 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 [2022-11-16 19:44:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:30,875 INFO L225 Difference]: With dead ends: 91 [2022-11-16 19:44:30,875 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 19:44:30,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=389, Invalid=7267, Unknown=0, NotChecked=0, Total=7656 [2022-11-16 19:44:30,876 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 118 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:30,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 24 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2029 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2022-11-16 19:44:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 19:44:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-16 19:44:30,879 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) [2022-11-16 19:44:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-16 19:44:30,879 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-11-16 19:44:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:30,880 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-16 19:44:30,880 INFO L496 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) [2022-11-16 19:44:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-16 19:44:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 19:44:30,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:30,881 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1] [2022-11-16 19:44:30,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:31,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:31,087 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1133213721, now seen corresponding path program 25 times [2022-11-16 19:44:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:31,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484292356] [2022-11-16 19:44:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:31,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 144 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:32,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484292356] [2022-11-16 19:44:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484292356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:32,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233985373] [2022-11-16 19:44:32,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:44:32,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:32,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:32,227 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:32,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 19:44:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:32,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 19:44:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:32,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:44:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:32,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:34,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233985373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239225767] [2022-11-16 19:44:34,483 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:34,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:34,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:34,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:34,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:34,499 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:34,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:34,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:34,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:34,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:34,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:35,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8984#(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 [2022-11-16 19:44:35,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:35,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:35,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 78 [2022-11-16 19:44:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320252779] [2022-11-16 19:44:35,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:35,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 19:44:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 19:44:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=6400, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 19:44:35,352 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:36,513 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-16 19:44:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 19:44:36,514 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 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 [2022-11-16 19:44:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:36,515 INFO L225 Difference]: With dead ends: 64 [2022-11-16 19:44:36,515 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 19:44:36,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1862, Invalid=8644, Unknown=0, NotChecked=0, Total=10506 [2022-11-16 19:44:36,516 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 227 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:36,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:44:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 19:44:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-16 19:44:36,519 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) [2022-11-16 19:44:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-11-16 19:44:36,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-11-16 19:44:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:36,519 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-11-16 19:44:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-11-16 19:44:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 19:44:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:36,521 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2022-11-16 19:44:36,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:36,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:36,727 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1903306720, now seen corresponding path program 26 times [2022-11-16 19:44:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:36,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668642906] [2022-11-16 19:44:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:38,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668642906] [2022-11-16 19:44:38,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668642906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:38,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145630091] [2022-11-16 19:44:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:44:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:38,068 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:38,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 19:44:38,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-16 19:44:38,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-16 19:44:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:39,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:39,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:44:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:39,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:39,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:44:39,383 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:44:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:39,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145630091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:39,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603736376] [2022-11-16 19:44:39,636 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:39,637 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:39,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:39,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:39,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:39,648 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:44:39,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:39,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:39,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:40,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9573#(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 [2022-11-16 19:44:40,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:40,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:40,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2022-11-16 19:44:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519755434] [2022-11-16 19:44:40,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:40,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 19:44:40,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 19:44:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3618, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 19:44:40,577 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) [2022-11-16 19:44:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:42,970 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-16 19:44:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 19:44:42,970 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 [2022-11-16 19:44:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:42,971 INFO L225 Difference]: With dead ends: 97 [2022-11-16 19:44:42,971 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 19:44:42,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 19:44:42,972 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 97 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:42,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:44:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 19:44:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-11-16 19:44:42,974 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) [2022-11-16 19:44:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-16 19:44:42,975 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-11-16 19:44:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:42,975 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-16 19:44:42,975 INFO L496 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) [2022-11-16 19:44:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-16 19:44:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 19:44:42,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:42,976 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1] [2022-11-16 19:44:42,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 19:44:43,183 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 127058619, now seen corresponding path program 27 times [2022-11-16 19:44:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506949899] [2022-11-16 19:44:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 169 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:44,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506949899] [2022-11-16 19:44:44,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506949899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294908315] [2022-11-16 19:44:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:44:44,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:44,404 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:44,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 19:44:45,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:44:45,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:45,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 19:44:45,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:45,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:44:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:45,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:47,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294908315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:47,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295579224] [2022-11-16 19:44:47,897 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:47,897 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:47,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:47,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:47,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:47,908 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:47,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:47,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:47,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:48,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:48,087 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:48,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10264#(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 [2022-11-16 19:44:48,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:48,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:48,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 81 [2022-11-16 19:44:48,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471919360] [2022-11-16 19:44:48,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-16 19:44:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-16 19:44:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=6820, Unknown=0, NotChecked=0, Total=7832 [2022-11-16 19:44:48,811 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:50,035 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-11-16 19:44:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 19:44:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 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 [2022-11-16 19:44:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:50,036 INFO L225 Difference]: With dead ends: 68 [2022-11-16 19:44:50,036 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:44:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2081, Invalid=9261, Unknown=0, NotChecked=0, Total=11342 [2022-11-16 19:44:50,037 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 313 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:50,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 2 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:44:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:44:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-16 19:44:50,040 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) [2022-11-16 19:44:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-11-16 19:44:50,040 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-11-16 19:44:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:50,041 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-11-16 19:44:50,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-11-16 19:44:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 19:44:50,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:50,041 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2022-11-16 19:44:50,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:50,242 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1844247988, now seen corresponding path program 28 times [2022-11-16 19:44:50,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:50,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377814401] [2022-11-16 19:44:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:51,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377814401] [2022-11-16 19:44:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377814401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906492927] [2022-11-16 19:44:51,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:44:51,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:51,657 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:51,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 19:44:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:51,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-16 19:44:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:52,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:52,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:44:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:44:52,889 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:44:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:53,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906492927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422968542] [2022-11-16 19:44:53,166 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:44:53,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:44:53,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:44:53,167 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:44:53,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:44:53,184 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:44:53,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:53,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:53,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:53,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:44:53,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:44:54,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10890#(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 [2022-11-16 19:44:54,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:44:54,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:44:54,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2022-11-16 19:44:54,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594103220] [2022-11-16 19:44:54,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 19:44:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:44:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 19:44:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3989, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 19:44:54,082 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) [2022-11-16 19:44:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:44:56,697 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-11-16 19:44:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 19:44:56,697 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 [2022-11-16 19:44:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:44:56,698 INFO L225 Difference]: With dead ends: 103 [2022-11-16 19:44:56,698 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 19:44:56,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=433, Invalid=9073, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 19:44:56,699 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 167 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:44:56,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 31 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:44:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 19:44:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-16 19:44:56,702 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) [2022-11-16 19:44:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-16 19:44:56,702 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-11-16 19:44:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:44:56,703 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-16 19:44:56,703 INFO L496 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) [2022-11-16 19:44:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-16 19:44:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 19:44:56,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:44:56,705 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1] [2022-11-16 19:44:56,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 19:44:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 19:44:56,916 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:44:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:44:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2050929423, now seen corresponding path program 29 times [2022-11-16 19:44:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:44:56,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561701695] [2022-11-16 19:44:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:44:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:44:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:44:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:58,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:44:58,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561701695] [2022-11-16 19:44:58,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561701695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:44:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068230833] [2022-11-16 19:44:58,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:44:58,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:58,336 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:58,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 19:44:58,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 19:44:58,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:58,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 19:44:58,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:00,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:01,221 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:45:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:01,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068230833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:01,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225546865] [2022-11-16 19:45:01,751 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:45:01,751 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:45:01,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:45:01,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:45:01,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:45:01,762 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:45:01,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:01,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:01,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:01,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:01,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:02,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11625#(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 [2022-11-16 19:45:02,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:45:02,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:45:02,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 87 [2022-11-16 19:45:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153816293] [2022-11-16 19:45:02,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:02,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-16 19:45:02,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:02,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-16 19:45:02,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=7647, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 19:45:02,598 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:45:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:03,951 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-16 19:45:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 19:45:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 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 [2022-11-16 19:45:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:03,952 INFO L225 Difference]: With dead ends: 72 [2022-11-16 19:45:03,952 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:45:03,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 126 SyntacticMatches, 17 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2338, Invalid=10544, Unknown=0, NotChecked=0, Total=12882 [2022-11-16 19:45:03,953 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 416 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:03,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 0 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:45:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:45:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-11-16 19:45:03,954 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) [2022-11-16 19:45:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-16 19:45:03,955 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-11-16 19:45:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:03,955 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-16 19:45:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:45:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-16 19:45:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 19:45:03,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:03,956 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2022-11-16 19:45:03,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 19:45:04,156 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:45:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash -446813944, now seen corresponding path program 30 times [2022-11-16 19:45:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:45:04,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273738296] [2022-11-16 19:45:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:45:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:45:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:45:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:05,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:45:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273738296] [2022-11-16 19:45:05,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273738296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:45:05,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955805065] [2022-11-16 19:45:05,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:45:05,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:05,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:05,701 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:05,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 19:45:06,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:45:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-16 19:45:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:07,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:35,049 INFO L321 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2022-11-16 19:45:35,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2022-11-16 19:45:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 38 proven. 479 refuted. 28 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:35,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:54,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-16 19:45:54,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:54,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 67 [2022-11-16 19:45:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 47 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:55,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955805065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984249453] [2022-11-16 19:45:55,321 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:45:55,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:45:55,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:45:55,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:45:55,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:45:55,342 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:45:55,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:45:55,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:55,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:45:55,478 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:45:56,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12334#(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 [2022-11-16 19:45:56,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:45:56,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:45:56,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 43, 43] total 107 [2022-11-16 19:45:56,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453694062] [2022-11-16 19:45:56,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:56,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-16 19:45:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:45:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-16 19:45:56,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=12187, Unknown=55, NotChecked=0, Total=12882 [2022-11-16 19:45:56,899 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:37,778 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-11-16 19:46:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 19:46:37,779 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 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 [2022-11-16 19:46:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:37,779 INFO L225 Difference]: With dead ends: 109 [2022-11-16 19:46:37,779 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 19:46:37,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 4798 ImplicationChecksByTransitivity, 89.8s TimeCoverageRelationStatistics Valid=1435, Invalid=22380, Unknown=55, NotChecked=0, Total=23870 [2022-11-16 19:46:37,781 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 189 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:37,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 32 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2757 Invalid, 0 Unknown, 447 Unchecked, 1.4s Time] [2022-11-16 19:46:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 19:46:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-16 19:46:37,784 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) [2022-11-16 19:46:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-16 19:46:37,784 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-11-16 19:46:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:37,785 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-16 19:46:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-16 19:46:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 19:46:37,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:37,786 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1] [2022-11-16 19:46:37,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 19:46:37,991 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:46:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:37,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1557117155, now seen corresponding path program 31 times [2022-11-16 19:46:37,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:37,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902068059] [2022-11-16 19:46:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:37,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 225 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:39,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902068059] [2022-11-16 19:46:39,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902068059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009368684] [2022-11-16 19:46:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:46:39,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:39,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:39,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 19:46:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-16 19:46:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:39,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:46:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:42,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009368684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:42,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37078644] [2022-11-16 19:46:42,681 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:46:42,681 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:46:42,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:46:42,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:46:42,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:46:42,691 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:46:42,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:46:42,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:42,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:42,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:46:44,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13130#(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 [2022-11-16 19:46:44,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:46:44,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:46:44,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 93 [2022-11-16 19:46:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607865574] [2022-11-16 19:46:44,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:46:44,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-16 19:46:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-16 19:46:44,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=8830, Unknown=0, NotChecked=0, Total=10100 [2022-11-16 19:46:44,006 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:45,832 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-16 19:46:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 19:46:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 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 [2022-11-16 19:46:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:45,833 INFO L225 Difference]: With dead ends: 76 [2022-11-16 19:46:45,833 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 19:46:45,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2600, Invalid=11920, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 19:46:45,835 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:45,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 0 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:46:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 19:46:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-16 19:46:45,838 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) [2022-11-16 19:46:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-16 19:46:45,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-11-16 19:46:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:45,839 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-16 19:46:45,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-16 19:46:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 19:46:45,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:45,840 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2022-11-16 19:46:45,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 19:46:46,040 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:46:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1740966364, now seen corresponding path program 32 times [2022-11-16 19:46:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:46,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495399106] [2022-11-16 19:46:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:47,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:47,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495399106] [2022-11-16 19:46:47,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495399106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:47,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025380425] [2022-11-16 19:46:47,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:46:47,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:47,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:47,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 19:46:48,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-16 19:46:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-16 19:46:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:49,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:49,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:46:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:49,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:49,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:46:49,435 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:46:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:49,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025380425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:49,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888388627] [2022-11-16 19:46:49,715 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:46:49,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:46:49,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:46:49,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:46:49,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:46:49,725 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:46:49,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:49,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:49,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:49,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:49,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:46:50,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13830#(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 [2022-11-16 19:46:50,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:46:50,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:46:50,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2022-11-16 19:46:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384334021] [2022-11-16 19:46:50,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:46:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 19:46:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:46:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 19:46:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4785, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 19:46:50,651 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:53,933 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2022-11-16 19:46:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 19:46:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2022-11-16 19:46:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:53,934 INFO L225 Difference]: With dead ends: 115 [2022-11-16 19:46:53,935 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 19:46:53,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=477, Invalid=11079, Unknown=0, NotChecked=0, Total=11556 [2022-11-16 19:46:53,936 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:53,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 38 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 19:46:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 19:46:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-16 19:46:53,938 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) [2022-11-16 19:46:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-16 19:46:53,939 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-11-16 19:46:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:53,939 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-16 19:46:53,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-16 19:46:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 19:46:53,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:53,941 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1] [2022-11-16 19:46:53,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:54,147 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:46:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1444596681, now seen corresponding path program 33 times [2022-11-16 19:46:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:46:54,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887860284] [2022-11-16 19:46:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:46:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:46:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 256 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:55,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:46:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887860284] [2022-11-16 19:46:55,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887860284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:46:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983560744] [2022-11-16 19:46:55,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:46:55,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:55,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:55,442 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:55,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 19:46:56,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:46:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:56,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-16 19:46:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:56,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:46:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:57,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:59,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983560744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:59,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322136694] [2022-11-16 19:46:59,648 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:46:59,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:46:59,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:46:59,648 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:46:59,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:46:59,664 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:46:59,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:59,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:59,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:59,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:46:59,840 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:47:00,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14650#(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 [2022-11-16 19:47:00,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:47:00,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:47:00,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 96 [2022-11-16 19:47:00,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242606196] [2022-11-16 19:47:00,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:00,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-16 19:47:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:00,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-16 19:47:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=9319, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 19:47:00,642 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:02,303 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-16 19:47:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 19:47:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 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 [2022-11-16 19:47:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:02,304 INFO L225 Difference]: With dead ends: 80 [2022-11-16 19:47:02,304 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 19:47:02,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2861, Invalid=12639, Unknown=0, NotChecked=0, Total=15500 [2022-11-16 19:47:02,305 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 533 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:02,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:47:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 19:47:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-16 19:47:02,307 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) [2022-11-16 19:47:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-16 19:47:02,308 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-11-16 19:47:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:02,308 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-16 19:47:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-16 19:47:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 19:47:02,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:02,309 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2022-11-16 19:47:02,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-16 19:47:02,517 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:47:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -982974416, now seen corresponding path program 34 times [2022-11-16 19:47:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:02,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320730502] [2022-11-16 19:47:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:04,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320730502] [2022-11-16 19:47:04,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320730502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:04,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500741060] [2022-11-16 19:47:04,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:47:04,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:04,157 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:04,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 19:47:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-16 19:47:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:05,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:47:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:05,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:05,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:47:05,697 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:47:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:05,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500741060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859282562] [2022-11-16 19:47:05,981 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:47:05,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:47:05,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:47:05,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:47:05,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:47:06,000 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:47:06,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:06,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:06,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:06,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:06,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:47:06,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15387#(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 [2022-11-16 19:47:06,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:47:06,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:47:06,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2022-11-16 19:47:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816553263] [2022-11-16 19:47:06,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:06,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 19:47:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 19:47:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2022-11-16 19:47:06,945 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) [2022-11-16 19:47:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:10,642 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-16 19:47:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 19:47:10,643 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 [2022-11-16 19:47:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:10,643 INFO L225 Difference]: With dead ends: 121 [2022-11-16 19:47:10,643 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 19:47:10,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=499, Invalid=12157, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 19:47:10,650 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:10,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 46 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 19:47:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 19:47:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-11-16 19:47:10,657 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) [2022-11-16 19:47:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-11-16 19:47:10,657 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-11-16 19:47:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:10,658 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-11-16 19:47:10,658 INFO L496 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) [2022-11-16 19:47:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-11-16 19:47:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 19:47:10,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:10,659 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1] [2022-11-16 19:47:10,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:10,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 19:47:10,859 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:47:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:10,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1281787147, now seen corresponding path program 35 times [2022-11-16 19:47:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980956313] [2022-11-16 19:47:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 289 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:12,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980956313] [2022-11-16 19:47:12,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980956313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189760558] [2022-11-16 19:47:12,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:47:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:12,280 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:12,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 19:47:13,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-16 19:47:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 19:47:13,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:13,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:47:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189760558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870949428] [2022-11-16 19:47:17,417 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:47:17,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:47:17,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:47:17,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:47:17,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:47:17,429 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:47:17,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:17,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:17,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:17,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:17,577 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:47:18,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16271#(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 [2022-11-16 19:47:18,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:47:18,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:47:18,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 122 [2022-11-16 19:47:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418624211] [2022-11-16 19:47:18,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-16 19:47:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:47:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-16 19:47:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2341, Invalid=14429, Unknown=0, NotChecked=0, Total=16770 [2022-11-16 19:47:18,407 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 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) [2022-11-16 19:47:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:19,786 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-11-16 19:47:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 19:47:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 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 [2022-11-16 19:47:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:19,787 INFO L225 Difference]: With dead ends: 84 [2022-11-16 19:47:19,787 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 19:47:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7765 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4202, Invalid=18750, Unknown=0, NotChecked=0, Total=22952 [2022-11-16 19:47:19,790 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 508 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:19,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 2 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:47:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 19:47:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-16 19:47:19,792 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) [2022-11-16 19:47:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-11-16 19:47:19,793 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-11-16 19:47:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:19,793 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-11-16 19:47:19,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 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) [2022-11-16 19:47:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-11-16 19:47:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-16 19:47:19,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:19,794 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2022-11-16 19:47:19,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-16 19:47:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:20,002 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:47:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash -858166268, now seen corresponding path program 36 times [2022-11-16 19:47:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:47:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374865785] [2022-11-16 19:47:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:47:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:47:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:21,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:47:21,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374865785] [2022-11-16 19:47:21,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374865785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:47:21,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786448547] [2022-11-16 19:47:21,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:47:21,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:21,989 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:21,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 19:47:22,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:47:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 173 conjunts are in the unsatisfiable core [2022-11-16 19:47:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:23,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:47:43,435 INFO L321 Elim1Store]: treesize reduction 101, result has 10.6 percent of original size [2022-11-16 19:47:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 148 treesize of output 70 [2022-11-16 19:47:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 21 proven. 724 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:43,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:57,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-11-16 19:47:57,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:57,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 211 treesize of output 155 [2022-11-16 19:47:58,845 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-11-16 19:48:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 202 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:02,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786448547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:02,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943263807] [2022-11-16 19:48:02,044 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:48:02,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:48:02,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:48:02,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:48:02,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:48:02,056 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:48:02,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:48:02,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:48:02,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:48:02,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:48:03,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17128#(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 [2022-11-16 19:48:03,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:48:03,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:48:03,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 57, 57] total 153 [2022-11-16 19:48:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720915024] [2022-11-16 19:48:03,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:48:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-11-16 19:48:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:48:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-11-16 19:48:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=23791, Unknown=26, NotChecked=0, Total=25440 [2022-11-16 19:48:03,951 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:48,727 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2022-11-16 19:50:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 19:50:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 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 [2022-11-16 19:50:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:48,728 INFO L225 Difference]: With dead ends: 127 [2022-11-16 19:50:48,728 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 19:50:48,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8311 ImplicationChecksByTransitivity, 202.1s TimeCoverageRelationStatistics Valid=2955, Invalid=43364, Unknown=121, NotChecked=0, Total=46440 [2022-11-16 19:50:48,731 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 156 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:48,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 53 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2829 Invalid, 0 Unknown, 812 Unchecked, 1.5s Time] [2022-11-16 19:50:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 19:50:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-16 19:50:48,733 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) [2022-11-16 19:50:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-16 19:50:48,733 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-11-16 19:50:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:48,734 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-16 19:50:48,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-16 19:50:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-16 19:50:48,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:48,735 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1] [2022-11-16 19:50:48,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:48,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:48,947 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:50:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash -578614433, now seen corresponding path program 37 times [2022-11-16 19:50:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:48,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842294251] [2022-11-16 19:50:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 324 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:51,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:50:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842294251] [2022-11-16 19:50:51,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842294251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:50:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008311755] [2022-11-16 19:50:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:50:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:51,105 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:51,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 19:50:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-16 19:50:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:51,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:50:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:52,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008311755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479198404] [2022-11-16 19:50:55,135 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:50:55,136 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:50:55,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:50:55,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:50:55,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:50:55,148 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:50:55,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:50:55,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:50:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:50:55,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:50:56,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18069#(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 [2022-11-16 19:50:56,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:50:56,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:50:56,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 108 [2022-11-16 19:50:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562211558] [2022-11-16 19:50:56,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:50:56,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-16 19:50:56,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:50:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-16 19:50:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1693, Invalid=11647, Unknown=0, NotChecked=0, Total=13340 [2022-11-16 19:50:56,301 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:58,712 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-11-16 19:50:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 19:50:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 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 [2022-11-16 19:50:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:58,713 INFO L225 Difference]: With dead ends: 88 [2022-11-16 19:50:58,713 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 19:50:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5791 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3464, Invalid=15718, Unknown=0, NotChecked=0, Total=19182 [2022-11-16 19:50:58,716 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 210 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:58,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 0 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 19:50:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 19:50:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-11-16 19:50:58,718 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) [2022-11-16 19:50:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-11-16 19:50:58,719 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-11-16 19:50:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:58,719 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-11-16 19:50:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:58,720 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-11-16 19:50:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 19:50:58,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:58,720 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2022-11-16 19:50:58,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 19:50:58,926 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:50:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1997689512, now seen corresponding path program 38 times [2022-11-16 19:50:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:50:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158702852] [2022-11-16 19:50:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:50:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:00,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:51:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158702852] [2022-11-16 19:51:00,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158702852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:51:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798213307] [2022-11-16 19:51:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:51:00,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:51:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:51:00,891 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:51:00,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 19:51:01,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-16 19:51:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:51:01,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-16 19:51:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:51:03,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:03,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:51:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:03,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:51:03,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:51:03,377 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:51:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:03,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798213307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:51:03,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727491482] [2022-11-16 19:51:03,693 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:51:03,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:51:03,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:51:03,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:51:03,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:03,704 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:51:03,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:03,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:03,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:03,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:03,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:51:04,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18880#(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 [2022-11-16 19:51:04,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:51:04,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:51:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 73 [2022-11-16 19:51:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232116768] [2022-11-16 19:51:04,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:51:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 19:51:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:51:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 19:51:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6114, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 19:51:04,705 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) [2022-11-16 19:51:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:51:09,041 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-11-16 19:51:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 19:51:09,041 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 [2022-11-16 19:51:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:51:09,043 INFO L225 Difference]: With dead ends: 133 [2022-11-16 19:51:09,043 INFO L226 Difference]: Without dead ends: 90 [2022-11-16 19:51:09,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=543, Invalid=14463, Unknown=0, NotChecked=0, Total=15006 [2022-11-16 19:51:09,044 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 174 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:51:09,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 36 Invalid, 4751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4639 Invalid, 0 Unknown, 89 Unchecked, 2.0s Time] [2022-11-16 19:51:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-16 19:51:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-11-16 19:51:09,046 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) [2022-11-16 19:51:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-16 19:51:09,046 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-11-16 19:51:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:51:09,047 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-16 19:51:09,047 INFO L496 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) [2022-11-16 19:51:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-16 19:51:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 19:51:09,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:51:09,048 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1] [2022-11-16 19:51:09,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-16 19:51:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 19:51:09,251 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:51:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:51:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -491641037, now seen corresponding path program 39 times [2022-11-16 19:51:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:51:09,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548169772] [2022-11-16 19:51:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:51:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:51:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 361 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:10,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:51:10,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548169772] [2022-11-16 19:51:10,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548169772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:51:10,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649179258] [2022-11-16 19:51:10,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:51:10,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:51:10,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:51:10,987 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:51:10,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 19:51:13,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:51:13,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:51:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-16 19:51:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:51:13,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:51:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:14,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:51:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649179258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:51:17,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667872566] [2022-11-16 19:51:17,622 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:51:17,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:51:17,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:51:17,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:51:17,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:17,637 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:51:17,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:51:17,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:17,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:17,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:51:19,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19829#(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 [2022-11-16 19:51:19,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:51:19,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:51:19,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 111 [2022-11-16 19:51:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591170931] [2022-11-16 19:51:19,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:51:19,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-16 19:51:19,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:51:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-16 19:51:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1837, Invalid=12205, Unknown=0, NotChecked=0, Total=14042 [2022-11-16 19:51:19,066 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:51:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:51:21,243 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-11-16 19:51:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 19:51:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 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 [2022-11-16 19:51:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:51:21,244 INFO L225 Difference]: With dead ends: 92 [2022-11-16 19:51:21,244 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 19:51:21,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3767, Invalid=16539, Unknown=0, NotChecked=0, Total=20306 [2022-11-16 19:51:21,245 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 415 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:51:21,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 19:51:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 19:51:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-11-16 19:51:21,247 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) [2022-11-16 19:51:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-11-16 19:51:21,248 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-11-16 19:51:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:51:21,248 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-11-16 19:51:21,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:51:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-11-16 19:51:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-16 19:51:21,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:51:21,249 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2022-11-16 19:51:21,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 19:51:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 19:51:21,458 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:51:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:51:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash -20634580, now seen corresponding path program 40 times [2022-11-16 19:51:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:51:21,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611336831] [2022-11-16 19:51:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:51:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:51:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:23,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:51:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611336831] [2022-11-16 19:51:23,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611336831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:51:23,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628971735] [2022-11-16 19:51:23,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:51:23,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:51:23,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:51:23,730 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:51:23,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 19:51:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-16 19:51:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:51:25,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:25,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:51:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:25,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:51:25,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 19:51:25,604 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:51:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628971735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:51:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701068127] [2022-11-16 19:51:25,940 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:51:25,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:51:25,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:51:25,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:51:25,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:25,951 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:51:25,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:25,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:26,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:26,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:26,102 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:51:26,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20677#(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 [2022-11-16 19:51:26,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:51:26,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:51:26,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 76 [2022-11-16 19:51:26,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469244081] [2022-11-16 19:51:26,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:51:26,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-16 19:51:26,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:51:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-16 19:51:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=6593, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 19:51:26,974 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) [2022-11-16 19:51:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:51:31,742 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-11-16 19:51:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-16 19:51:31,743 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 [2022-11-16 19:51:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:51:31,743 INFO L225 Difference]: With dead ends: 139 [2022-11-16 19:51:31,743 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 19:51:31,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=565, Invalid=15691, Unknown=0, NotChecked=0, Total=16256 [2022-11-16 19:51:31,745 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5342 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:51:31,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 5418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5342 Invalid, 0 Unknown, 53 Unchecked, 2.2s Time] [2022-11-16 19:51:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 19:51:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-11-16 19:51:31,747 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) [2022-11-16 19:51:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-16 19:51:31,748 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-11-16 19:51:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:51:31,748 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-16 19:51:31,749 INFO L496 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) [2022-11-16 19:51:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-16 19:51:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 19:51:31,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:51:31,750 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1] [2022-11-16 19:51:31,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 19:51:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 19:51:31,956 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:51:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:51:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1951188857, now seen corresponding path program 41 times [2022-11-16 19:51:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:51:31,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400665368] [2022-11-16 19:51:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:51:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:51:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 400 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:33,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:51:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400665368] [2022-11-16 19:51:33,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400665368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:51:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212107574] [2022-11-16 19:51:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:51:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:51:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:51:33,808 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:51:33,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 19:51:34,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-16 19:51:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:51:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 19:51:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:51:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:51:38,534 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:51:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:39,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212107574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:51:39,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802015219] [2022-11-16 19:51:39,382 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:51:39,382 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:51:39,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:51:39,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:51:39,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:51:39,392 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:51:39,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:39,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:39,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:39,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:51:39,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:51:40,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21670#(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 [2022-11-16 19:51:40,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:51:40,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:51:40,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 117 [2022-11-16 19:51:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10637564] [2022-11-16 19:51:40,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:51:40,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-16 19:51:40,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:51:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-16 19:51:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=13227, Unknown=0, NotChecked=0, Total=15500 [2022-11-16 19:51:40,339 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:51:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:51:42,007 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-11-16 19:51:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 19:51:42,007 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 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 [2022-11-16 19:51:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:51:42,008 INFO L225 Difference]: With dead ends: 96 [2022-11-16 19:51:42,008 INFO L226 Difference]: Without dead ends: 96 [2022-11-16 19:51:42,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 174 SyntacticMatches, 23 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8984 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4114, Invalid=18236, Unknown=0, NotChecked=0, Total=22350 [2022-11-16 19:51:42,010 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 271 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:51:42,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:51:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-16 19:51:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-11-16 19:51:42,012 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) [2022-11-16 19:51:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-11-16 19:51:42,012 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-11-16 19:51:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:51:42,013 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-11-16 19:51:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:51:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-11-16 19:51:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 19:51:42,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:51:42,014 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2022-11-16 19:51:42,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 19:51:42,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 19:51:42,219 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 19:51:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:51:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1808216192, now seen corresponding path program 42 times [2022-11-16 19:51:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:51:42,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117248063] [2022-11-16 19:51:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:51:42,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:51:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:51:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:51:44,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:51:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117248063] [2022-11-16 19:51:44,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117248063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:51:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135009620] [2022-11-16 19:51:44,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:51:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:51:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:51:44,763 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:51:44,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80c32d6d-b92b-41b0-b634-25be50481195/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 19:51:45,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:51:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:51:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 203 conjunts are in the unsatisfiable core [2022-11-16 19:51:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:51:47,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:52:34,959 INFO L321 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2022-11-16 19:52:34,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 198 treesize of output 102 [2022-11-16 19:52:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 24 proven. 950 refuted. 39 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:34,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:56,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 248 [2022-11-16 19:52:56,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:52:56,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 286 treesize of output 210 [2022-11-16 19:52:59,734 WARN L718 sPolynomialRelations]: Constructing 524288(two to the power of 19 dual juncts. [2022-11-16 19:53:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 365 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:53:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135009620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566295975] [2022-11-16 19:53:27,634 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 19:53:27,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:53:27,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:53:27,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:53:27,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:53:27,645 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-16 19:53:27,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:53:27,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:53:27,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 19:53:27,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:53:29,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22657#(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 [2022-11-16 19:53:29,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:53:29,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:53:29,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 68, 68] total 181 [2022-11-16 19:53:29,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800546675] [2022-11-16 19:53:29,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:29,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-11-16 19:53:29,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:53:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-11-16 19:53:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2329, Invalid=32756, Unknown=71, NotChecked=0, Total=35156 [2022-11-16 19:53:29,868 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 182 states, 182 states have (on average 1.521978021978022) internal successors, (277), 181 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:05,395 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 93 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:16,058 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 95 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:30,742 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 98 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:42,645 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 100 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:58,684 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 103 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:56:12,094 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 105 DAG size of output: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:56:30,486 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:56:45,104 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 110 DAG size of output: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:57:05,351 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 113 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)