./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur --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 fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- 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-38b53e6 [2022-11-26 00:12:04,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:12:04,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:12:04,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:12:04,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:12:04,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:12:04,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:12:04,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:12:04,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:12:04,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:12:04,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:12:04,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:12:04,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:12:04,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:12:04,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:12:04,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:12:04,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:12:04,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:12:04,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:12:04,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:12:04,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:12:04,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:12:04,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:12:04,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:12:04,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:12:04,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:12:04,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:12:04,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:12:04,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:12:04,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:12:04,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:12:04,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:12:04,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:12:04,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:12:04,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:12:04,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:12:04,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:12:04,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:12:04,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:12:04,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:12:04,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:12:04,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:12:04,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:12:04,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:12:04,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:12:04,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:12:04,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:12:04,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:12:04,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:12:04,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:12:04,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:12:04,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:12:04,289 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:12:04,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:12:04,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:12:04,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:12:04,290 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:12:04,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:12:04,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:12:04,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:12:04,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:12:04,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:12:04,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:12:04,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:12:04,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:12:04,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:12:04,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:12:04,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:12:04,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:12:04,295 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:12:04,295 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:12:04,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:12:04,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:12:04,296 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:12:04,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:12:04,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:12:04,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:12:04,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:04,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:12:04,298 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:12:04,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:12:04,298 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:12:04,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:12:04,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:12:04,299 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_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2022-11-26 00:12:04,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:12:04,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:12:04,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:12:04,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:12:04,649 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:12:04,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2022-11-26 00:12:07,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:12:08,026 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:12:08,027 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2022-11-26 00:12:08,040 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/data/f48536cc2/1ef9a52607d244faa87ecce965a5cbee/FLAG907b2699a [2022-11-26 00:12:08,068 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/data/f48536cc2/1ef9a52607d244faa87ecce965a5cbee [2022-11-26 00:12:08,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:12:08,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:12:08,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:08,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:12:08,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:12:08,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c3a3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08, skipping insertion in model container [2022-11-26 00:12:08,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:12:08,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:12:08,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:08,500 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:12:08,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:08,595 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:12:08,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08 WrapperNode [2022-11-26 00:12:08,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:08,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:08,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:12:08,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:12:08,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,644 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-26 00:12:08,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:08,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:12:08,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:12:08,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:12:08,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,671 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:12:08,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:12:08,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:12:08,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:12:08,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (1/1) ... [2022-11-26 00:12:08,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:08,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:08,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:12:08,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:12:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:12:08,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:12:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:12:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:12:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:12:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:12:08,916 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:12:08,918 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:12:09,212 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:12:09,331 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:12:09,331 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:12:09,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:09 BoogieIcfgContainer [2022-11-26 00:12:09,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:12:09,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:12:09,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:12:09,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:12:09,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:12:08" (1/3) ... [2022-11-26 00:12:09,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2f60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:09, skipping insertion in model container [2022-11-26 00:12:09,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:08" (2/3) ... [2022-11-26 00:12:09,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2f60ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:09, skipping insertion in model container [2022-11-26 00:12:09,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:09" (3/3) ... [2022-11-26 00:12:09,356 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2022-11-26 00:12:09,379 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:12:09,380 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-26 00:12:09,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:12:09,453 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;@7ff597c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:12:09,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-26 00:12:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 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) [2022-11-26 00:12:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:12:09,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:09,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:12:09,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 104379, now seen corresponding path program 1 times [2022-11-26 00:12:09,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:09,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750012169] [2022-11-26 00:12:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:09,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:09,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750012169] [2022-11-26 00:12:09,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750012169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:09,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:09,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:12:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259458586] [2022-11-26 00:12:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:12:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:12:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:12:09,798 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 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) 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) [2022-11-26 00:12:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:09,875 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-11-26 00:12:09,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:12:09,878 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 [2022-11-26 00:12:09,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:09,887 INFO L225 Difference]: With dead ends: 22 [2022-11-26 00:12:09,887 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:12:09,889 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 [2022-11-26 00:12:09,894 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:09,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:12:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-26 00:12:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-26 00:12:09,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 3 [2022-11-26 00:12:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:09,935 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-26 00:12:09,935 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) [2022-11-26 00:12:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-26 00:12:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:12:09,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:09,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:12:09,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:12:09,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 3236553, now seen corresponding path program 1 times [2022-11-26 00:12:09,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:09,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236278176] [2022-11-26 00:12:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:10,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236278176] [2022-11-26 00:12:10,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236278176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:10,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:10,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:12:10,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443659839] [2022-11-26 00:12:10,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:10,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:12:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:12:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:12:10,120 INFO L87 Difference]: Start difference. First operand 20 states and 21 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) [2022-11-26 00:12:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:10,147 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-26 00:12:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:12:10,147 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 [2022-11-26 00:12:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:10,148 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:12:10,148 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:12:10,149 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 [2022-11-26 00:12:10,150 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:10,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:12:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:12:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-26 00:12:10,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 4 [2022-11-26 00:12:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:10,156 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-26 00:12:10,156 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) [2022-11-26 00:12:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-26 00:12:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:12:10,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:10,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:12:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:12:10,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 3236554, now seen corresponding path program 1 times [2022-11-26 00:12:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:10,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669843465] [2022-11-26 00:12:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:10,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:10,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669843465] [2022-11-26 00:12:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669843465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:10,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:10,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:12:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061519781] [2022-11-26 00:12:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:10,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:12:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:12:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:10,560 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:12:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:10,689 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-26 00:12:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:12:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-11-26 00:12:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:10,693 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:12:10,693 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:12:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:12:10,701 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:10,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:12:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2022-11-26 00:12:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 19 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) [2022-11-26 00:12:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-26 00:12:10,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2022-11-26 00:12:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:10,712 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-26 00:12:10,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:12:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-26 00:12:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:12:10,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:10,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:12:10,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:12:10,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash 3238051, now seen corresponding path program 1 times [2022-11-26 00:12:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812880897] [2022-11-26 00:12:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:10,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:10,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812880897] [2022-11-26 00:12:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812880897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:10,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:10,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:12:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133708655] [2022-11-26 00:12:10,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:10,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:12:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:12:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:10,924 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:12:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:10,984 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-26 00:12:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:12:10,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-11-26 00:12:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:10,987 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:12:10,987 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:12:10,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:10,989 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:10,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:12:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2022-11-26 00:12:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-26 00:12:10,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 4 [2022-11-26 00:12:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:10,993 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-26 00:12:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-26 00:12:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-26 00:12:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:12:10,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:10,994 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-26 00:12:10,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:12:10,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1184601517, now seen corresponding path program 1 times [2022-11-26 00:12:10,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:10,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205102503] [2022-11-26 00:12:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:10,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:11,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205102503] [2022-11-26 00:12:11,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205102503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117670405] [2022-11-26 00:12:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:11,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:11,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:11,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:12:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:12:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:11,591 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:12:11,592 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:12:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:11,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:11,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117670405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804003054] [2022-11-26 00:12:12,002 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-26 00:12:12,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:12,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:12,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:12,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:12,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:12,201 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 [2022-11-26 00:12:12,320 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 [2022-11-26 00:12:12,371 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 [2022-11-26 00:12:12,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:12,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:12,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:12,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:12,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-26 00:12:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022467417] [2022-11-26 00:12:12,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:12,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:12:12,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:12,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:12:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:12:12,830 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2022-11-26 00:12:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:13,238 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-11-26 00:12:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:12:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 6 [2022-11-26 00:12:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:13,240 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:12:13,240 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:12:13,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:12:13,241 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 154 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:13,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 66 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:12:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 19. [2022-11-26 00:12:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-26 00:12:13,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2022-11-26 00:12:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-26 00:12:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2022-11-26 00:12:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-26 00:12:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:12:13,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:13,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:12:13,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:13,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:13,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1184600020, now seen corresponding path program 1 times [2022-11-26 00:12:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760058539] [2022-11-26 00:12:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:13,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760058539] [2022-11-26 00:12:13,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760058539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561930585] [2022-11-26 00:12:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:13,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:13,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:13,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:12:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:13,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:12:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:13,882 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:12:13,883 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-26 00:12:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:14,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561930585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796447714] [2022-11-26 00:12:14,199 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-26 00:12:14,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:14,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:14,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:14,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:14,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:14,283 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 [2022-11-26 00:12:14,348 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 [2022-11-26 00:12:14,374 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 [2022-11-26 00:12:14,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:14,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length2~0#1|)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (not (<= (+ |ULTIMATE.start_main_~length2~0#1| |ULTIMATE.start_main_~nondetString~0#1.offset|) (select |#length| |ULTIMATE.start_main_~nondetString~0#1.base|))) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:14,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:14,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:14,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-26 00:12:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029165362] [2022-11-26 00:12:14,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:12:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:12:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:12:14,996 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) 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) [2022-11-26 00:12:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:15,323 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-11-26 00:12:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:12:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) 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) Word has length 6 [2022-11-26 00:12:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:15,324 INFO L225 Difference]: With dead ends: 30 [2022-11-26 00:12:15,324 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:12:15,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:12:15,325 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:15,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 55 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:12:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2022-11-26 00:12:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 15 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) [2022-11-26 00:12:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-26 00:12:15,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2022-11-26 00:12:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:15,328 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-26 00:12:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) 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) [2022-11-26 00:12:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-26 00:12:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:12:15,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:15,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:12:15,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:12:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:12:15,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167129, now seen corresponding path program 1 times [2022-11-26 00:12:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:15,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496273333] [2022-11-26 00:12:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:15,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:15,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496273333] [2022-11-26 00:12:15,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496273333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:15,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:15,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:12:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460012778] [2022-11-26 00:12:15,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:15,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:12:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:12:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:15,669 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.5) 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) [2022-11-26 00:12:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:15,721 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-26 00:12:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:12:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) 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 [2022-11-26 00:12:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:15,722 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:12:15,722 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:12:15,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:15,723 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:15,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:12:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-11-26 00:12:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 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) [2022-11-26 00:12:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-26 00:12:15,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2022-11-26 00:12:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:15,730 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-26 00:12:15,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) 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) [2022-11-26 00:12:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-26 00:12:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:12:15,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:15,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:12:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:12:15,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1183167130, now seen corresponding path program 1 times [2022-11-26 00:12:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:15,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865491321] [2022-11-26 00:12:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:15,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:15,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865491321] [2022-11-26 00:12:15,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865491321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:12:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713779368] [2022-11-26 00:12:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:12:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:12:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:12:15,800 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-11-26 00:12:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:15,832 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-26 00:12:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:12:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2022-11-26 00:12:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:15,833 INFO L225 Difference]: With dead ends: 17 [2022-11-26 00:12:15,833 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:12:15,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:15,835 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:15,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:12:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 00:12:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) 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) [2022-11-26 00:12:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-26 00:12:15,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 6 [2022-11-26 00:12:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:15,839 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-26 00:12:15,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-11-26 00:12:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-26 00:12:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:12:15,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:15,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:15,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:12:15,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524653, now seen corresponding path program 1 times [2022-11-26 00:12:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810651656] [2022-11-26 00:12:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:15,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:15,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810651656] [2022-11-26 00:12:15,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810651656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:15,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:15,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:12:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204740153] [2022-11-26 00:12:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:12:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:12:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:12:15,990 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2022-11-26 00:12:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:16,047 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-26 00:12:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:12:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 [2022-11-26 00:12:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:16,048 INFO L225 Difference]: With dead ends: 16 [2022-11-26 00:12:16,048 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:12:16,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:16,051 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:16,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:12:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:12:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 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) [2022-11-26 00:12:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-26 00:12:16,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2022-11-26 00:12:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:16,057 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-26 00:12:16,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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) [2022-11-26 00:12:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-26 00:12:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:12:16,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:16,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:16,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:12:16,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:16,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:16,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1976524654, now seen corresponding path program 1 times [2022-11-26 00:12:16,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:16,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265342709] [2022-11-26 00:12:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:16,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:16,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265342709] [2022-11-26 00:12:16,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265342709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:16,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:16,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:12:16,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167403812] [2022-11-26 00:12:16,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:12:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:12:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:16,401 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2022-11-26 00:12:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:16,561 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-26 00:12:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:12:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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 [2022-11-26 00:12:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:16,562 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:12:16,562 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:12:16,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:12:16,563 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:16,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 16 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:12:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2022-11-26 00:12:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-26 00:12:16,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-11-26 00:12:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:16,566 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-26 00:12:16,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 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) [2022-11-26 00:12:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-26 00:12:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:12:16,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:16,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:16,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:12:16,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1328103237, now seen corresponding path program 1 times [2022-11-26 00:12:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:16,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169050142] [2022-11-26 00:12:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:16,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:16,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169050142] [2022-11-26 00:12:16,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169050142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:16,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31484870] [2022-11-26 00:12:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:16,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:16,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:16,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:16,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:12:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 00:12:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:16,953 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 9 treesize of output 11 [2022-11-26 00:12:16,960 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 10 treesize of output 8 [2022-11-26 00:12:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:17,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:17,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:17,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31484870] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:17,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:12:17,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 13 [2022-11-26 00:12:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937362382] [2022-11-26 00:12:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:12:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:12:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:12:17,157 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:17,349 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-11-26 00:12:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:12:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:12:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:17,350 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:12:17,350 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:12:17,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:12:17,351 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:17,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:12:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-11-26 00:12:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2857142857142858) 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) [2022-11-26 00:12:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-26 00:12:17,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-11-26 00:12:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-26 00:12:17,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-26 00:12:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:12:17,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:17,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:17,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:12:17,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:12:17,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1355666300, now seen corresponding path program 1 times [2022-11-26 00:12:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333039333] [2022-11-26 00:12:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:17,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333039333] [2022-11-26 00:12:17,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333039333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:17,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:17,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:12:17,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271345502] [2022-11-26 00:12:17,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:17,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:12:17,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:12:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:12:17,754 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-26 00:12:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:17,771 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-26 00:12:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:12:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:12:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:17,772 INFO L225 Difference]: With dead ends: 16 [2022-11-26 00:12:17,774 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:12:17,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:12:17,776 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 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 [2022-11-26 00:12:17,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:12:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 00:12:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 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) [2022-11-26 00:12:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-26 00:12:17,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2022-11-26 00:12:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:17,782 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-26 00:12:17,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-26 00:12:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-26 00:12:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:12:17,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:17,783 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:17,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:12:17,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1355665169, now seen corresponding path program 1 times [2022-11-26 00:12:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:17,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778746460] [2022-11-26 00:12:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:17,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778746460] [2022-11-26 00:12:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778746460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:17,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:17,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:12:17,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076760576] [2022-11-26 00:12:17,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:17,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:12:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:12:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:17,977 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-26 00:12:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:18,147 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-26 00:12:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:12:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:12:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:18,148 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:12:18,148 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:12:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:12:18,149 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:18,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:12:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:12:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-26 00:12:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) 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) [2022-11-26 00:12:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-26 00:12:18,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-11-26 00:12:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:18,151 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-26 00:12:18,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-26 00:12:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-26 00:12:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:12:18,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:18,152 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:12:18,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 284798392, now seen corresponding path program 1 times [2022-11-26 00:12:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861440784] [2022-11-26 00:12:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:18,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861440784] [2022-11-26 00:12:18,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861440784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784496468] [2022-11-26 00:12:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:18,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:18,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:18,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:12:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:12:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:18,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:18,699 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 5 treesize of output 3 [2022-11-26 00:12:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:18,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784496468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:18,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127222412] [2022-11-26 00:12:18,727 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:18,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:18,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:18,728 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:18,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:18,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:18,809 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 11 treesize of output 7 [2022-11-26 00:12:18,862 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 [2022-11-26 00:12:18,929 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 [2022-11-26 00:12:18,982 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 [2022-11-26 00:12:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:19,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:19,079 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:19,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:19,386 INFO L321 Elim1Store]: treesize reduction 169, result has 12.9 percent of original size [2022-11-26 00:12:19,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 266 treesize of output 261 [2022-11-26 00:12:19,841 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:19,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:20,000 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:20,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:20,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:22,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '945#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:22,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:22,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:22,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-11-26 00:12:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434102727] [2022-11-26 00:12:22,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:22,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:12:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:12:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:12:22,182 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 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) [2022-11-26 00:12:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:22,425 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-26 00:12:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:12:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:12:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:22,427 INFO L225 Difference]: With dead ends: 22 [2022-11-26 00:12:22,427 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:12:22,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:12:22,428 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:22,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 13 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:12:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2022-11-26 00:12:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-26 00:12:22,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2022-11-26 00:12:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:22,431 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-26 00:12:22,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 17 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) [2022-11-26 00:12:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-26 00:12:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:12:22,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:22,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:22,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:22,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:22,644 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 238815549, now seen corresponding path program 1 times [2022-11-26 00:12:22,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508631636] [2022-11-26 00:12:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:23,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508631636] [2022-11-26 00:12:23,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508631636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35596657] [2022-11-26 00:12:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:23,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:23,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:23,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:23,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:12:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 00:12:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:23,216 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 9 treesize of output 11 [2022-11-26 00:12:23,226 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 10 treesize of output 8 [2022-11-26 00:12:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:23,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:23,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35596657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1650324665] [2022-11-26 00:12:23,728 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:23,729 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:23,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:23,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:23,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:23,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:23,812 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 [2022-11-26 00:12:23,867 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 [2022-11-26 00:12:23,907 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 [2022-11-26 00:12:23,966 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 [2022-11-26 00:12:24,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:24,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:24,064 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:24,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:24,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:24,365 INFO L321 Elim1Store]: treesize reduction 171, result has 20.5 percent of original size [2022-11-26 00:12:24,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 265 [2022-11-26 00:12:24,861 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:24,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:24,999 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:24,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:25,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:27,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1102#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:27,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:27,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:27,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-11-26 00:12:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469938729] [2022-11-26 00:12:27,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:27,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:12:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:12:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:12:27,145 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:27,839 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-26 00:12:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:12:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 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 13 [2022-11-26 00:12:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:27,840 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:12:27,840 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:12:27,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:12:27,841 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 101 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:27,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 11 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:12:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-26 00:12:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) 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) [2022-11-26 00:12:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-26 00:12:27,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2022-11-26 00:12:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:27,844 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-26 00:12:27,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-26 00:12:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:12:27,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:27,845 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:27,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:28,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:12:28,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2088173760, now seen corresponding path program 2 times [2022-11-26 00:12:28,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:28,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804429702] [2022-11-26 00:12:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:28,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804429702] [2022-11-26 00:12:28,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804429702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981746687] [2022-11-26 00:12:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:28,528 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:28,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:12:28,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:12:28,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 00:12:28,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:28,792 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 10 treesize of output 8 [2022-11-26 00:12:28,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-11-26 00:12:28,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:12:28,974 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 [2022-11-26 00:12:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:28,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:29,031 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_196 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_196) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-26 00:12:29,065 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_196 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_196) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:12:29,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:29,074 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:12:29,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:29,081 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 37 treesize of output 32 [2022-11-26 00:12:29,084 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 3 [2022-11-26 00:12:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-26 00:12:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981746687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403961016] [2022-11-26 00:12:29,203 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:29,203 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:29,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:29,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:29,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:29,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:29,294 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 [2022-11-26 00:12:29,341 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 [2022-11-26 00:12:29,397 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 [2022-11-26 00:12:29,457 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 [2022-11-26 00:12:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:29,543 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:29,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:29,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:29,825 INFO L321 Elim1Store]: treesize reduction 171, result has 20.5 percent of original size [2022-11-26 00:12:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 265 [2022-11-26 00:12:30,194 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:30,333 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:30,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:30,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:32,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1280#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:32,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:32,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-11-26 00:12:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152529483] [2022-11-26 00:12:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:12:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:12:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=772, Unknown=2, NotChecked=114, Total=992 [2022-11-26 00:12:32,638 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-11-26 00:12:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:33,095 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-26 00:12:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:12:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 16 [2022-11-26 00:12:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:33,096 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:12:33,096 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:12:33,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=183, Invalid=1083, Unknown=2, NotChecked=138, Total=1406 [2022-11-26 00:12:33,098 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:33,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-26 00:12:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:12:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-26 00:12:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) 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) [2022-11-26 00:12:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-26 00:12:33,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-11-26 00:12:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:33,101 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-26 00:12:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-11-26 00:12:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-26 00:12:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:12:33,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:33,102 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:12:33,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:12:33,309 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash 980812489, now seen corresponding path program 3 times [2022-11-26 00:12:33,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:33,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480793395] [2022-11-26 00:12:33,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:33,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:33,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480793395] [2022-11-26 00:12:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480793395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660983083] [2022-11-26 00:12:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:12:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:33,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:33,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:12:33,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:12:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 00:12:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:33,761 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:12:33,762 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:12:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:34,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660983083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568592260] [2022-11-26 00:12:34,185 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:34,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:34,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:34,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:34,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:34,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:34,261 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 11 treesize of output 7 [2022-11-26 00:12:34,309 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 [2022-11-26 00:12:34,347 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 [2022-11-26 00:12:34,402 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 [2022-11-26 00:12:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:34,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:34,521 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:34,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:34,788 INFO L321 Elim1Store]: treesize reduction 169, result has 12.9 percent of original size [2022-11-26 00:12:34,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 261 [2022-11-26 00:12:35,144 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:35,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:35,257 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:35,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:35,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:37,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1479#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:37,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:37,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:37,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-26 00:12:37,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469517323] [2022-11-26 00:12:37,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:12:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:12:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:12:37,407 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-11-26 00:12:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:37,760 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-11-26 00:12:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:12:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) Word has length 18 [2022-11-26 00:12:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:37,761 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:12:37,761 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 00:12:37,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:12:37,762 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:37,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 22 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:37,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 00:12:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-26 00:12:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-26 00:12:37,765 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2022-11-26 00:12:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:37,765 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-26 00:12:37,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 23 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) [2022-11-26 00:12:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-26 00:12:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:12:37,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:37,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:12:37,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:37,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:12:37,972 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:37,973 INFO L85 PathProgramCache]: Analyzing trace with hash 340416076, now seen corresponding path program 2 times [2022-11-26 00:12:37,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:37,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942806412] [2022-11-26 00:12:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:37,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:38,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:38,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942806412] [2022-11-26 00:12:38,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942806412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:38,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907263145] [2022-11-26 00:12:38,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:38,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:38,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:38,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:12:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:12:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-26 00:12:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:38,727 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 9 treesize of output 11 [2022-11-26 00:12:38,730 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 10 treesize of output 8 [2022-11-26 00:12:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:39,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:39,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:39,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907263145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489023899] [2022-11-26 00:12:39,503 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:39,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:39,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:39,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:39,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:39,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:39,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:39,580 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 [2022-11-26 00:12:39,634 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 [2022-11-26 00:12:39,669 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 [2022-11-26 00:12:39,722 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 [2022-11-26 00:12:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:39,802 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:39,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:40,063 INFO L321 Elim1Store]: treesize reduction 169, result has 22.8 percent of original size [2022-11-26 00:12:40,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 266 treesize of output 277 [2022-11-26 00:12:40,467 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:40,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:40,579 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:40,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:40,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:42,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1694#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:42,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:42,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:42,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-11-26 00:12:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528857441] [2022-11-26 00:12:42,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:12:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:12:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:12:42,918 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:43,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:43,904 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-26 00:12:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:12:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 19 [2022-11-26 00:12:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:43,905 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:12:43,905 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:12:43,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:12:43,906 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:43,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 20 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:12:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:12:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-26 00:12:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) 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) [2022-11-26 00:12:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-26 00:12:43,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2022-11-26 00:12:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:43,909 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-26 00:12:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-26 00:12:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:12:43,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:43,910 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:12:43,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:44,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:12:44,116 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 917529937, now seen corresponding path program 4 times [2022-11-26 00:12:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933346431] [2022-11-26 00:12:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:44,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933346431] [2022-11-26 00:12:44,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933346431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610981991] [2022-11-26 00:12:44,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:12:44,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:44,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:44,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:12:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:44,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:12:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:44,935 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 10 treesize of output 8 [2022-11-26 00:12:45,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-26 00:12:45,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:12:45,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:12:45,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:45,553 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 20 treesize of output 17 [2022-11-26 00:12:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:46,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:46,409 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:12:46,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:46,421 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 37 treesize of output 36 [2022-11-26 00:12:46,427 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 11 treesize of output 7 [2022-11-26 00:12:46,433 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 [2022-11-26 00:12:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:46,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610981991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925394491] [2022-11-26 00:12:46,647 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:46,647 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:46,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:46,648 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:46,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:46,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:46,724 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 [2022-11-26 00:12:46,765 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 [2022-11-26 00:12:46,790 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 [2022-11-26 00:12:46,852 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 [2022-11-26 00:12:46,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:46,957 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:46,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:47,082 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:47,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:47,220 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:47,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:47,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:48,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1946#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:48,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:48,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:48,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2022-11-26 00:12:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214095466] [2022-11-26 00:12:48,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:12:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:12:48,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2354, Unknown=1, NotChecked=0, Total=2550 [2022-11-26 00:12:48,893 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 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) [2022-11-26 00:12:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:50,868 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2022-11-26 00:12:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:12:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 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) Word has length 22 [2022-11-26 00:12:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:50,869 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:12:50,869 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:12:50,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=585, Invalid=4816, Unknown=1, NotChecked=0, Total=5402 [2022-11-26 00:12:50,871 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:50,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 41 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:12:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:12:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-11-26 00:12:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-11-26 00:12:50,874 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2022-11-26 00:12:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:50,874 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-11-26 00:12:50,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 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) [2022-11-26 00:12:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-11-26 00:12:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:12:50,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:50,875 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-26 00:12:50,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:51,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1572968091, now seen corresponding path program 3 times [2022-11-26 00:12:51,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:51,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004445407] [2022-11-26 00:12:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:51,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004445407] [2022-11-26 00:12:51,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004445407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940181035] [2022-11-26 00:12:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:12:51,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:51,988 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:52,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:12:52,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:12:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-26 00:12:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:52,185 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 11 treesize of output 13 [2022-11-26 00:12:52,189 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 10 treesize of output 8 [2022-11-26 00:12:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:52,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:53,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:53,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940181035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216685268] [2022-11-26 00:12:53,452 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:12:53,452 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:53,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:53,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:53,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:53,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:12:53,521 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 [2022-11-26 00:12:53,568 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 [2022-11-26 00:12:53,605 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 [2022-11-26 00:12:53,656 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 14 treesize of output 10 [2022-11-26 00:12:53,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:53,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:53,728 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:12:53,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:12:53,999 INFO L321 Elim1Store]: treesize reduction 169, result has 22.8 percent of original size [2022-11-26 00:12:54,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 267 [2022-11-26 00:12:54,386 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:54,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:54,502 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:54,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:12:54,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:56,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2259#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:12:56,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:56,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:56,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-11-26 00:12:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303037385] [2022-11-26 00:12:56,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:56,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:12:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:12:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:12:56,760 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:58,483 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-11-26 00:12:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:12:58,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 25 [2022-11-26 00:12:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:58,484 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:12:58,484 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:12:58,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=445, Invalid=3215, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:12:58,486 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 224 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:58,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 50 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:12:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:12:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-26 00:12:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) 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) [2022-11-26 00:12:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-26 00:12:58,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2022-11-26 00:12:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:58,492 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-26 00:12:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-26 00:12:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:12:58,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:58,494 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-26 00:12:58,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:58,699 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:12:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2095771998, now seen corresponding path program 5 times [2022-11-26 00:12:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578209393] [2022-11-26 00:12:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:59,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578209393] [2022-11-26 00:12:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578209393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555249536] [2022-11-26 00:12:59,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:12:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:59,571 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:59,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:12:59,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:12:59,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:12:59,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-26 00:12:59,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:59,956 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 10 treesize of output 8 [2022-11-26 00:13:00,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-26 00:13:00,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:13:00,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:13:02,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:13:04,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:04,961 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 20 treesize of output 17 [2022-11-26 00:13:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:05,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:11,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:11,987 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-26 00:13:12,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:12,002 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 33 treesize of output 34 [2022-11-26 00:13:12,011 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 9 treesize of output 7 [2022-11-26 00:13:12,018 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 [2022-11-26 00:13:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:12,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555249536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:12,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860590606] [2022-11-26 00:13:12,389 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:13:12,389 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:12,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:12,390 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:12,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:13:12,473 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 [2022-11-26 00:13:12,516 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 [2022-11-26 00:13:12,562 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 [2022-11-26 00:13:12,607 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 [2022-11-26 00:13:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:12,700 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:13:12,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:13:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:12,990 INFO L321 Elim1Store]: treesize reduction 163, result has 22.7 percent of original size [2022-11-26 00:13:12,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 269 [2022-11-26 00:13:13,970 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:13:13,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:13:14,076 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:13:14,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:13:14,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:17,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2574#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:13:17,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:17,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:13:17,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2022-11-26 00:13:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237198910] [2022-11-26 00:13:17,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:17,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 00:13:17,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:17,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 00:13:17,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3177, Unknown=18, NotChecked=0, Total=3422 [2022-11-26 00:13:17,247 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2022-11-26 00:13:36,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:13:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:46,854 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-26 00:13:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:13:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) Word has length 28 [2022-11-26 00:13:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:46,856 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:13:46,856 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:13:46,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=929, Invalid=6535, Unknown=18, NotChecked=0, Total=7482 [2022-11-26 00:13:46,859 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 219 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:46,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 58 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 550 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:13:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:13:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-11-26 00:13:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-26 00:13:46,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 28 [2022-11-26 00:13:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:46,863 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-26 00:13:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2022-11-26 00:13:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-26 00:13:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:13:46,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:46,864 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 00:13:46,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-26 00:13:47,067 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:13:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1001579990, now seen corresponding path program 4 times [2022-11-26 00:13:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860540632] [2022-11-26 00:13:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:47,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860540632] [2022-11-26 00:13:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860540632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691648520] [2022-11-26 00:13:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:13:47,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:47,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:47,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:13:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:48,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-26 00:13:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:48,169 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 9 treesize of output 11 [2022-11-26 00:13:48,173 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 10 treesize of output 8 [2022-11-26 00:13:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:48,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:49,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:49,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691648520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:49,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732741210] [2022-11-26 00:13:49,673 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:13:49,674 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:49,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:49,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:49,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:49,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:49,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:13:49,749 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 [2022-11-26 00:13:49,793 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 [2022-11-26 00:13:49,819 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 [2022-11-26 00:13:49,880 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 [2022-11-26 00:13:49,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:49,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:49,971 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:13:49,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:13:50,103 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:13:50,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:13:50,239 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:13:50,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:13:50,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:53,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2955#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:13:53,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:53,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:13:53,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2022-11-26 00:13:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164748728] [2022-11-26 00:13:53,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:53,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:13:53,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:13:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:13:53,043 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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) [2022-11-26 00:13:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:55,184 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-11-26 00:13:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:13:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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 31 [2022-11-26 00:13:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:55,188 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:13:55,188 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:13:55,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=605, Invalid=3951, Unknown=0, NotChecked=0, Total=4556 [2022-11-26 00:13:55,190 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 297 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:55,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 47 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:13:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:13:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-26 00:13:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.0857142857142856) 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) [2022-11-26 00:13:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-26 00:13:55,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2022-11-26 00:13:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:55,194 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-26 00:13:55,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 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) [2022-11-26 00:13:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-26 00:13:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:13:55,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:55,195 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 00:13:55,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:55,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:13:55,395 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:13:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -931681101, now seen corresponding path program 6 times [2022-11-26 00:13:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271387857] [2022-11-26 00:13:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:55,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:56,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271387857] [2022-11-26 00:13:56,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271387857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904349450] [2022-11-26 00:13:56,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:13:56,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:56,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:56,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:56,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:13:56,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:13:56,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-26 00:13:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:56,973 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 10 treesize of output 8 [2022-11-26 00:13:57,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-26 00:13:57,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:13:57,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:13:57,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:13:57,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:13:57,741 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 [2022-11-26 00:13:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:57,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:57,765 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-26 00:14:02,199 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:14:02,210 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_497 (Array Int Int)) (v_ArrVal_499 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_497) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:14:02,220 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:14:02,235 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_496 (Array Int Int)) (v_ArrVal_499 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_496) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_499) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:14:02,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:14:02,326 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:14:02,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:14:02,333 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 37 treesize of output 32 [2022-11-26 00:14:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 32 not checked. [2022-11-26 00:14:02,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904349450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:02,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477321410] [2022-11-26 00:14:02,549 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:14:02,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:02,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:02,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:02,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:02,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:14:02,612 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 [2022-11-26 00:14:02,647 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 [2022-11-26 00:14:02,669 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 [2022-11-26 00:14:02,720 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 [2022-11-26 00:14:02,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:02,823 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:14:02,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:14:02,930 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:02,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:03,068 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:03,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:03,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:05,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3314#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:14:05,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:05,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:05,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 45 [2022-11-26 00:14:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030436601] [2022-11-26 00:14:05,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:05,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:14:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:14:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2168, Unknown=35, NotChecked=490, Total=2862 [2022-11-26 00:14:05,940 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:08,090 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-11-26 00:14:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:14:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2022-11-26 00:14:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:08,091 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:14:08,091 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:14:08,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=365, Invalid=4042, Unknown=35, NotChecked=670, Total=5112 [2022-11-26 00:14:08,093 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 109 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 14 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:08,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 130 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 585 Invalid, 19 Unknown, 133 Unchecked, 0.6s Time] [2022-11-26 00:14:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:14:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-26 00:14:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.0810810810810811) 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) [2022-11-26 00:14:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-26 00:14:08,098 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-11-26 00:14:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:08,098 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-26 00:14:08,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-26 00:14:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:14:08,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:08,099 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-26 00:14:08,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:08,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:08,306 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:14:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 880254588, now seen corresponding path program 7 times [2022-11-26 00:14:08,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:08,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385123982] [2022-11-26 00:14:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:09,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:09,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385123982] [2022-11-26 00:14:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385123982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:09,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812702163] [2022-11-26 00:14:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:14:09,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:09,010 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:09,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:14:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-26 00:14:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:09,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:09,888 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 5 treesize of output 3 [2022-11-26 00:14:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812702163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486403137] [2022-11-26 00:14:10,031 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:14:10,031 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:10,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:10,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:10,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:10,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:14:10,109 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 [2022-11-26 00:14:10,148 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 [2022-11-26 00:14:10,171 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 [2022-11-26 00:14:10,227 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 [2022-11-26 00:14:10,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:10,337 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:14:10,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:14:10,446 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:10,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:10,554 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:10,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:10,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:12,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3702#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:14:12,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:12,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:12,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-26 00:14:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986888238] [2022-11-26 00:14:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:12,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:14:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:14:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-11-26 00:14:12,263 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 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) [2022-11-26 00:14:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:13,211 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-26 00:14:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:14:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 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) Word has length 36 [2022-11-26 00:14:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:13,212 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:14:13,212 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:14:13,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=438, Invalid=2532, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:14:13,214 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 220 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:13,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 57 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:14:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:14:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-26 00:14:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-26 00:14:13,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2022-11-26 00:14:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:13,217 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-26 00:14:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 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) [2022-11-26 00:14:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-26 00:14:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:14:13,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:13,218 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-26 00:14:13,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 00:14:13,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:13,424 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:14:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1518088441, now seen corresponding path program 5 times [2022-11-26 00:14:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262436194] [2022-11-26 00:14:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:14,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262436194] [2022-11-26 00:14:14,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262436194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771356867] [2022-11-26 00:14:14,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:14:14,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:14,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:14,627 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:14,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:14:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:14:14,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-26 00:14:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:15,030 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 10 treesize of output 8 [2022-11-26 00:14:15,037 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 9 treesize of output 11 [2022-11-26 00:14:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:16,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:17,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:17,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771356867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820500230] [2022-11-26 00:14:17,306 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:14:17,306 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:17,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:17,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:17,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:17,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:14:17,388 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 [2022-11-26 00:14:17,434 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 [2022-11-26 00:14:17,459 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 [2022-11-26 00:14:17,512 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 [2022-11-26 00:14:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:17,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:17,615 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:14:17,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:14:17,711 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:17,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:17,812 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:17,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:17,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:20,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4092#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:14:20,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:20,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:20,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 48 [2022-11-26 00:14:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011186643] [2022-11-26 00:14:20,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:20,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 00:14:20,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 00:14:20,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3155, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:14:20,005 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:23,276 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-26 00:14:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:14:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 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 37 [2022-11-26 00:14:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:23,277 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:14:23,277 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:14:23,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=934, Invalid=5872, Unknown=0, NotChecked=0, Total=6806 [2022-11-26 00:14:23,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 390 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:23,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 57 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:14:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:14:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-26 00:14:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) 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) [2022-11-26 00:14:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-26 00:14:23,282 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2022-11-26 00:14:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:23,282 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-26 00:14:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-26 00:14:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:14:23,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:23,284 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2022-11-26 00:14:23,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:14:23,490 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:14:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:23,491 INFO L85 PathProgramCache]: Analyzing trace with hash -632885372, now seen corresponding path program 8 times [2022-11-26 00:14:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971337596] [2022-11-26 00:14:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:24,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971337596] [2022-11-26 00:14:24,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971337596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34825075] [2022-11-26 00:14:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:14:24,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:24,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:24,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:14:25,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:14:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:25,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-26 00:14:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:25,421 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 10 treesize of output 8 [2022-11-26 00:14:25,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-26 00:14:26,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:14:26,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:14:26,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:14:26,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:14:27,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:14:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:27,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:14:27,401 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 17 treesize of output 10 [2022-11-26 00:14:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:27,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:27,428 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-26 00:14:27,589 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int)) (v_ArrVal_676 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_676) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:14:43,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:14:43,825 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:14:43,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:14:43,833 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 37 treesize of output 32 [2022-11-26 00:14:43,838 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 3 [2022-11-26 00:14:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2022-11-26 00:14:44,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34825075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016968521] [2022-11-26 00:14:44,393 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:14:44,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:44,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:44,394 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:44,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:44,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:14:44,475 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 [2022-11-26 00:14:44,513 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 [2022-11-26 00:14:44,555 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 [2022-11-26 00:14:44,606 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 [2022-11-26 00:14:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:44,700 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:14:44,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:14:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:44,937 INFO L321 Elim1Store]: treesize reduction 163, result has 21.3 percent of original size [2022-11-26 00:14:44,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 251 treesize of output 260 [2022-11-26 00:14:45,528 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:45,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:45,640 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:45,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:45,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:48,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4536#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:14:48,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:48,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:48,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 66 [2022-11-26 00:14:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303835785] [2022-11-26 00:14:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-26 00:14:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-26 00:14:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4908, Unknown=92, NotChecked=286, Total=5550 [2022-11-26 00:14:48,951 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 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) [2022-11-26 00:14:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:51,626 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-11-26 00:14:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:14:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 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 40 [2022-11-26 00:14:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:51,627 INFO L225 Difference]: With dead ends: 71 [2022-11-26 00:14:51,627 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 00:14:51,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=487, Invalid=7618, Unknown=93, NotChecked=358, Total=8556 [2022-11-26 00:14:51,629 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 131 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:51,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 196 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1014 Invalid, 0 Unknown, 82 Unchecked, 0.8s Time] [2022-11-26 00:14:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 00:14:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-26 00:14:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.069767441860465) 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) [2022-11-26 00:14:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-26 00:14:51,646 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2022-11-26 00:14:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:51,646 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-26 00:14:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.621212121212121) internal successors, (107), 66 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) [2022-11-26 00:14:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-26 00:14:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:14:51,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:51,651 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2022-11-26 00:14:51,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:51,852 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:14:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:51,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1368565389, now seen corresponding path program 9 times [2022-11-26 00:14:51,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:51,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662781692] [2022-11-26 00:14:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:52,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:52,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662781692] [2022-11-26 00:14:52,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662781692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901820828] [2022-11-26 00:14:52,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:14:52,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:52,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:52,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:52,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:14:52,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:14:52,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:14:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:52,932 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:14:52,933 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:14:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:53,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901820828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525277424] [2022-11-26 00:14:54,055 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:14:54,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:54,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:54,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:54,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:54,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:14:54,127 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 [2022-11-26 00:14:54,174 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 [2022-11-26 00:14:54,196 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 [2022-11-26 00:14:54,238 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 [2022-11-26 00:14:54,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:54,334 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:14:54,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:14:54,465 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:54,638 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:14:54,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:14:54,706 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:57,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4988#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.offset|) (<= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:14:57,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:57,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:57,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2022-11-26 00:14:57,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462443677] [2022-11-26 00:14:57,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:57,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:14:57,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:14:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2369, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:14:57,419 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:58,482 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-26 00:14:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:14:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-26 00:14:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:58,483 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:14:58,483 INFO L226 Difference]: Without dead ends: 51 [2022-11-26 00:14:58,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=740, Invalid=3816, Unknown=0, NotChecked=0, Total=4556 [2022-11-26 00:14:58,484 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:58,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:14:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-26 00:14:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-11-26 00:14:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-26 00:14:58,487 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2022-11-26 00:14:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:58,487 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-26 00:14:58,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:14:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-26 00:14:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:14:58,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:58,488 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2022-11-26 00:14:58,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:58,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:14:58,689 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:14:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -524145912, now seen corresponding path program 6 times [2022-11-26 00:14:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:58,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077159895] [2022-11-26 00:14:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:14:59,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:59,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077159895] [2022-11-26 00:14:59,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077159895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:59,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428881531] [2022-11-26 00:14:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:14:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:59,870 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:59,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:15:00,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:00,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-26 00:15:00,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:00,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:00,150 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 11 treesize of output 13 [2022-11-26 00:15:00,153 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 10 treesize of output 8 [2022-11-26 00:15:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 21 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:03,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:03,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428881531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202356823] [2022-11-26 00:15:03,420 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:15:03,420 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:03,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:03,421 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:03,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:03,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:15:03,502 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 [2022-11-26 00:15:03,542 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 [2022-11-26 00:15:03,568 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 [2022-11-26 00:15:03,616 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 [2022-11-26 00:15:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:03,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:03,734 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:15:03,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:15:03,852 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:03,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:03,958 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:03,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:04,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:06,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5436#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:15:06,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:06,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:06,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 54 [2022-11-26 00:15:06,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529383165] [2022-11-26 00:15:06,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:06,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-26 00:15:06,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-26 00:15:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2022-11-26 00:15:06,273 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:09,592 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-11-26 00:15:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:15:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 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 43 [2022-11-26 00:15:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:09,593 INFO L225 Difference]: With dead ends: 50 [2022-11-26 00:15:09,593 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:15:09,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1217, Invalid=7525, Unknown=0, NotChecked=0, Total=8742 [2022-11-26 00:15:09,595 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 385 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:09,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 90 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:15:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:15:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-26 00:15:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-26 00:15:09,598 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2022-11-26 00:15:09,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:09,598 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-26 00:15:09,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-26 00:15:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:15:09,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:09,599 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2022-11-26 00:15:09,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:09,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:15:09,806 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:15:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:09,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1670219541, now seen corresponding path program 10 times [2022-11-26 00:15:09,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:09,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786520046] [2022-11-26 00:15:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:09,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:11,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786520046] [2022-11-26 00:15:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786520046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626456934] [2022-11-26 00:15:11,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:15:11,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:11,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:11,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:15:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-26 00:15:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:11,882 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 10 treesize of output 8 [2022-11-26 00:15:12,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-11-26 00:15:12,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-26 00:15:12,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:15:12,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:15:12,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:15:13,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:15:13,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 00:15:13,032 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 [2022-11-26 00:15:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:13,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:13,050 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2022-11-26 00:15:13,062 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:13,071 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 1 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:13,197 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_879 (Array Int Int)) (v_ArrVal_881 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_879) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:17,702 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int)) (v_ArrVal_881 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:17,711 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:22,013 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0)) is different from false [2022-11-26 00:15:22,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:15:22,021 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-26 00:15:22,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:15:22,029 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 37 treesize of output 32 [2022-11-26 00:15:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 62 not checked. [2022-11-26 00:15:22,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626456934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863805706] [2022-11-26 00:15:22,335 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:15:22,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:22,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:22,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:22,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:22,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:22,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:15:22,413 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 [2022-11-26 00:15:22,458 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 [2022-11-26 00:15:22,481 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 [2022-11-26 00:15:22,522 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 [2022-11-26 00:15:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:22,618 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:15:22,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:15:22,725 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:22,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:22,844 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:22,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:22,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:25,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5933#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:15:25,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:25,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:25,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 26] total 61 [2022-11-26 00:15:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737276140] [2022-11-26 00:15:25,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:25,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-26 00:15:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-26 00:15:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3642, Unknown=70, NotChecked=896, Total=4830 [2022-11-26 00:15:25,123 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:28,339 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-11-26 00:15:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:15:28,340 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2022-11-26 00:15:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:28,340 INFO L225 Difference]: With dead ends: 81 [2022-11-26 00:15:28,340 INFO L226 Difference]: Without dead ends: 52 [2022-11-26 00:15:28,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=425, Invalid=6339, Unknown=70, NotChecked=1176, Total=8010 [2022-11-26 00:15:28,342 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:28,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 215 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1174 Invalid, 3 Unknown, 304 Unchecked, 1.1s Time] [2022-11-26 00:15:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-26 00:15:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-26 00:15:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.0612244897959184) 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) [2022-11-26 00:15:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-26 00:15:28,344 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-26 00:15:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:28,345 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-26 00:15:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.721311475409836) internal successors, (105), 61 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-26 00:15:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:15:28,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:28,346 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-26 00:15:28,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:15:28,552 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:15:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1728844638, now seen corresponding path program 11 times [2022-11-26 00:15:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:28,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334480319] [2022-11-26 00:15:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:28,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:29,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334480319] [2022-11-26 00:15:29,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334480319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685943247] [2022-11-26 00:15:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:29,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:29,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:29,542 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:29,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:15:30,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-26 00:15:30,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-26 00:15:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:30,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:31,427 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 [2022-11-26 00:15:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:31,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685943247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:31,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138981573] [2022-11-26 00:15:31,678 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:15:31,678 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:31,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:31,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:31,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:31,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:31,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:15:31,758 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 [2022-11-26 00:15:31,795 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 [2022-11-26 00:15:31,816 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 [2022-11-26 00:15:31,867 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 [2022-11-26 00:15:31,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:31,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:31,965 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:15:31,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:15:32,055 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:32,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:32,167 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:32,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:32,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:34,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6448#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:15:34,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:34,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:34,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2022-11-26 00:15:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172848310] [2022-11-26 00:15:34,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:15:34,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:15:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2819, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:15:34,123 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:35,684 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-11-26 00:15:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:15:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-26 00:15:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:35,685 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:15:35,685 INFO L226 Difference]: Without dead ends: 57 [2022-11-26 00:15:35,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=893, Invalid=4657, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:15:35,687 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:35,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 67 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:15:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-26 00:15:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-11-26 00:15:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-11-26 00:15:35,690 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2022-11-26 00:15:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:35,691 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-11-26 00:15:35,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6808510638297873) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-11-26 00:15:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:15:35,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:35,692 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-26 00:15:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:35,900 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:15:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2054576215, now seen corresponding path program 7 times [2022-11-26 00:15:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:35,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935176901] [2022-11-26 00:15:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:37,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:37,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935176901] [2022-11-26 00:15:37,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935176901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869946959] [2022-11-26 00:15:37,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:15:37,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:37,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:37,523 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:37,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:15:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-26 00:15:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:37,869 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 9 treesize of output 11 [2022-11-26 00:15:37,881 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 10 treesize of output 8 [2022-11-26 00:15:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:39,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:40,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869946959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:40,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533404289] [2022-11-26 00:15:40,991 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:15:40,991 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:40,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:40,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:40,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:41,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 00:15:41,066 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 [2022-11-26 00:15:41,110 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 [2022-11-26 00:15:41,146 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 [2022-11-26 00:15:41,199 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 [2022-11-26 00:15:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:41,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:41,280 INFO L321 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2022-11-26 00:15:41,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:15:41,493 INFO L321 Elim1Store]: treesize reduction 161, result has 23.7 percent of original size [2022-11-26 00:15:41,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 259 treesize of output 272 [2022-11-26 00:15:42,035 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:42,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:42,149 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:15:42,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:15:42,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:45,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6953#(and (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= (select |#valid| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) 1) (= |ULTIMATE.start_cstrcpy_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_cstrcpy_#t~post3#1.base|) |ULTIMATE.start_cstrcpy_#t~post3#1.offset|)) (<= 0 |ULTIMATE.start_cstrcpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_cstrcpy_~src~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= (+ |ULTIMATE.start_cstrcpy_#t~post3#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcpy_#t~post3#1.base|)) (<= |ULTIMATE.start_cstrcpy_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrcpy_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_~dst~0#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_cstrcpy_~dst~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_cstrcpy_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc7#1.base|) (< (select |#length| |ULTIMATE.start_cstrcpy_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcpy_#t~post2#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcpy_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcpy_#in~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_#t~post3#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_cstrcpy_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrcpy_~s2#1.offset|))' at error location [2022-11-26 00:15:45,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:45,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:45,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 59 [2022-11-26 00:15:45,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490116661] [2022-11-26 00:15:45,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-26 00:15:45,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-26 00:15:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=4496, Unknown=0, NotChecked=0, Total=4830 [2022-11-26 00:15:45,613 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:49,231 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-26 00:15:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:15:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 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 49 [2022-11-26 00:15:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:49,233 INFO L225 Difference]: With dead ends: 56 [2022-11-26 00:15:49,233 INFO L226 Difference]: Without dead ends: 56 [2022-11-26 00:15:49,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1219, Invalid=7711, Unknown=0, NotChecked=0, Total=8930 [2022-11-26 00:15:49,234 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 421 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:49,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 116 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:15:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-26 00:15:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-26 00:15:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0566037735849056) 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) [2022-11-26 00:15:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-26 00:15:49,236 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2022-11-26 00:15:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:49,236 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-26 00:15:49,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-26 00:15:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:15:49,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:49,238 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2022-11-26 00:15:49,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:49,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:49,443 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:15:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:49,443 INFO L85 PathProgramCache]: Analyzing trace with hash 301081446, now seen corresponding path program 12 times [2022-11-26 00:15:49,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:49,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83279968] [2022-11-26 00:15:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:49,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:51,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83279968] [2022-11-26 00:15:51,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83279968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187144849] [2022-11-26 00:15:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:51,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:51,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:51,655 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:51,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a4ee0d0-8616-4a65-89ba-672263124298/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:15:52,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-26 00:15:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:52,726 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 [2022-11-26 00:15:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:52,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:53,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:53,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:53,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:54,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:54,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-26 00:15:55,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:55,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:15:55,151 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 10 [2022-11-26 00:15:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:55,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:25,630 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| Int) (v_ArrVal_1112 Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| Int) (v_ArrVal_1111 Int) (v_ArrVal_1114 Int) (v_ArrVal_1102 Int) (v_ArrVal_1104 Int) (v_ArrVal_1106 Int) (v_ArrVal_1109 Int)) (or (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266|) (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242| (store (store (store (store (store (store (store (select |c_#memory_int| |v_ULTIMATE.start_cstrcpy_~dst~0#1.base_242|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| v_ArrVal_1102) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| v_ArrVal_1104) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| v_ArrVal_1106) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| v_ArrVal_1109) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| v_ArrVal_1111) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268| v_ArrVal_1112) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_266| v_ArrVal_1114)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|)) 0) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272|) (not (<= |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_278| |c_ULTIMATE.start_cstrcpy_~dst~0#1.offset|)) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_272| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_276| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_274|) (< (+ |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_270| 1) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_268|))) is different from false [2022-11-26 00:22:26,165 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 838991838 treesize of output 838205406