./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh --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 64bit --witnessprinter.graph.data.programhash de88cb9f8af309bfee7e34496a9472de4d446e8ed690818c0d2fc3e900b2d7c4 --- 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-2329fc7 [2022-12-14 12:32:13,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:32:13,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:32:13,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:32:13,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:32:13,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:32:13,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:32:13,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:32:13,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:32:13,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:32:13,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:32:13,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:32:13,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:32:13,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:32:13,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:32:13,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:32:13,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:32:13,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:32:13,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:32:13,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:32:13,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:32:13,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:32:13,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:32:13,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:32:13,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:32:13,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:32:13,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:32:13,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:32:13,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:32:13,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:32:13,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:32:13,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:32:13,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:32:13,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:32:13,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:32:13,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:32:13,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:32:13,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:32:13,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:32:13,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:32:13,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:32:13,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 12:32:13,598 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:32:13,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:32:13,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:32:13,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:32:13,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:32:13,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:32:13,600 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:32:13,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:32:13,600 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:32:13,600 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:32:13,600 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:32:13,601 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:32:13,601 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:32:13,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:32:13,601 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:32:13,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:32:13,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:32:13,602 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:32:13,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:32:13,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:32:13,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:32:13,603 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:32:13,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:32:13,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:32:13,605 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:32:13,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:32:13,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:32:13,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:32:13,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:32:13,606 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:32:13,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:32:13,606 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:32:13,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:32:13,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:32:13,607 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_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de88cb9f8af309bfee7e34496a9472de4d446e8ed690818c0d2fc3e900b2d7c4 [2022-12-14 12:32:13,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:32:13,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:32:13,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:32:13,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:32:13,815 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:32:13,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-12-14 12:32:16,304 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:32:16,516 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:32:16,517 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-12-14 12:32:16,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/data/2299cbd15/adcd76263e804786ba656679dcbd22f0/FLAG8165589eb [2022-12-14 12:32:16,885 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/data/2299cbd15/adcd76263e804786ba656679dcbd22f0 [2022-12-14 12:32:16,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:32:16,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:32:16,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:32:16,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:32:16,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:32:16,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:32:16" (1/1) ... [2022-12-14 12:32:16,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d39efa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:16, skipping insertion in model container [2022-12-14 12:32:16,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:32:16" (1/1) ... [2022-12-14 12:32:16,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:32:16,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:32:17,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:32:17,141 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:32:17,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:32:17,189 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:32:17,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17 WrapperNode [2022-12-14 12:32:17,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:32:17,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:32:17,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:32:17,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:32:17,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,221 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-12-14 12:32:17,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:32:17,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:32:17,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:32:17,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:32:17,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,239 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:32:17,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:32:17,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:32:17,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:32:17,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (1/1) ... [2022-12-14 12:32:17,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:32:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:17,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:32:17,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:32:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:32:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:32:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:32:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:32:17,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:32:17,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:32:17,377 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:32:17,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:32:17,486 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:32:17,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:32:17,543 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:32:17,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:32:17 BoogieIcfgContainer [2022-12-14 12:32:17,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:32:17,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:32:17,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:32:17,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:32:17,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:32:16" (1/3) ... [2022-12-14 12:32:17,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d0acb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:32:17, skipping insertion in model container [2022-12-14 12:32:17,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:32:17" (2/3) ... [2022-12-14 12:32:17,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d0acb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:32:17, skipping insertion in model container [2022-12-14 12:32:17,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:32:17" (3/3) ... [2022-12-14 12:32:17,567 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-1.i [2022-12-14 12:32:17,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:32:17,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-14 12:32:17,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:32:17,618 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;@2a5a065, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:32:17,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-14 12:32:17,622 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) [2022-12-14 12:32:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:32:17,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:17,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:32:17,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 3303, now seen corresponding path program 1 times [2022-12-14 12:32:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401053224] [2022-12-14 12:32:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:17,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:17,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401053224] [2022-12-14 12:32:17,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401053224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:17,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:17,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:32:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823714512] [2022-12-14 12:32:17,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:32:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:32:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:32:17,876 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:17,912 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-12-14 12:32:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:32:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-12-14 12:32:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:17,921 INFO L225 Difference]: With dead ends: 20 [2022-12-14 12:32:17,922 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:32:17,923 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 [2022-12-14 12:32:17,927 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 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 [2022-12-14 12:32:17,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:32:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 12:32:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.8181818181818181) 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) [2022-12-14 12:32:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-12-14 12:32:17,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 2 [2022-12-14 12:32:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:17,956 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-12-14 12:32:17,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-12-14 12:32:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 12:32:17,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:17,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 12:32:17,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:32:17,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash 3304, now seen corresponding path program 1 times [2022-12-14 12:32:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:17,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986805918] [2022-12-14 12:32:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:17,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986805918] [2022-12-14 12:32:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986805918] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:32:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785949483] [2022-12-14 12:32:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:32:18,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:32:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:32:18,184 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,204 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-12-14 12:32:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:32:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-12-14 12:32:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,205 INFO L225 Difference]: With dead ends: 18 [2022-12-14 12:32:18,205 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 12:32:18,206 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 [2022-12-14 12:32:18,207 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 12:32:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 12:32:18,209 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) [2022-12-14 12:32:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-14 12:32:18,210 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 2 [2022-12-14 12:32:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-14 12:32:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-14 12:32:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:32:18,211 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:32:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:32:18,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 102382, now seen corresponding path program 1 times [2022-12-14 12:32:18,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863676535] [2022-12-14 12:32:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863676535] [2022-12-14 12:32:18,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863676535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:32:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136169329] [2022-12-14 12:32:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:32:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:32:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:32:18,260 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,280 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-12-14 12:32:18,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:32:18,280 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 [2022-12-14 12:32:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,281 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:32:18,281 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:32:18,281 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 [2022-12-14 12:32:18,282 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:32:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:32:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.6363636363636365) 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) [2022-12-14 12:32:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-12-14 12:32:18,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2022-12-14 12:32:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,286 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-12-14 12:32:18,286 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) [2022-12-14 12:32:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-12-14 12:32:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:32:18,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:32:18,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:32:18,287 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)] === [2022-12-14 12:32:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash 102383, now seen corresponding path program 1 times [2022-12-14 12:32:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471871899] [2022-12-14 12:32:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471871899] [2022-12-14 12:32:18,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471871899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:32:18,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185349337] [2022-12-14 12:32:18,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:32:18,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:32:18,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:32:18,443 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,464 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-12-14 12:32:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:32:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 12:32:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,465 INFO L225 Difference]: With dead ends: 16 [2022-12-14 12:32:18,465 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 12:32:18,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:32:18,466 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 12:32:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 12:32:18,469 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) [2022-12-14 12:32:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 12:32:18,470 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-12-14 12:32:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,470 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 12:32:18,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 12:32:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:32:18,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:32:18,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:32:18,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 98433309, now seen corresponding path program 1 times [2022-12-14 12:32:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873091438] [2022-12-14 12:32:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873091438] [2022-12-14 12:32:18,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873091438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:32:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811199177] [2022-12-14 12:32:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:32:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:32:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:32:18,538 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,574 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-12-14 12:32:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:32:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:32:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,574 INFO L225 Difference]: With dead ends: 15 [2022-12-14 12:32:18,574 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:32:18,575 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 [2022-12-14 12:32:18,576 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:32:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 12:32:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) 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) [2022-12-14 12:32:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 12:32:18,578 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2022-12-14 12:32:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,579 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 12:32:18,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 12:32:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:32:18,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:32:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:32:18,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 98433310, now seen corresponding path program 1 times [2022-12-14 12:32:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203762172] [2022-12-14 12:32:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203762172] [2022-12-14 12:32:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203762172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:32:18,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180894158] [2022-12-14 12:32:18,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:32:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:32:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:32:18,701 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,744 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-12-14 12:32:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:32:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:32:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,745 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:32:18,745 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:32:18,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:32:18,746 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:32:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:32:18,749 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) [2022-12-14 12:32:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-12-14 12:32:18,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 5 [2022-12-14 12:32:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,749 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-12-14 12:32:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-12-14 12:32:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:32:18,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:32:18,750 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 105165251, now seen corresponding path program 1 times [2022-12-14 12:32:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374346358] [2022-12-14 12:32:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374346358] [2022-12-14 12:32:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374346358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:32:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344852331] [2022-12-14 12:32:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:32:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:32:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:32:18,809 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) [2022-12-14 12:32:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:18,843 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-12-14 12:32:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:32:18,843 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 [2022-12-14 12:32:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:18,844 INFO L225 Difference]: With dead ends: 16 [2022-12-14 12:32:18,844 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 12:32:18,844 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 [2022-12-14 12:32:18,845 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:18,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 12:32:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 12:32:18,847 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) [2022-12-14 12:32:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 12:32:18,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2022-12-14 12:32:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 12:32:18,847 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) [2022-12-14 12:32:18,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 12:32:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:32:18,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:18,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:32:18,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 105165252, now seen corresponding path program 1 times [2022-12-14 12:32:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254509210] [2022-12-14 12:32:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:18,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:18,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254509210] [2022-12-14 12:32:18,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254509210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:18,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:18,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:32:18,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839585361] [2022-12-14 12:32:18,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:32:18,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:32:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:32:18,961 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 5 states have (on average 1.4) 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) [2022-12-14 12:32:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:19,018 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 12:32:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:32:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) 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 [2022-12-14 12:32:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:19,019 INFO L225 Difference]: With dead ends: 19 [2022-12-14 12:32:19,019 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:32:19,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:32:19,020 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 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 [2022-12-14 12:32:19,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:32:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-12-14 12:32:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) 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) [2022-12-14 12:32:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-14 12:32:19,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2022-12-14 12:32:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:19,023 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-14 12:32:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) 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) [2022-12-14 12:32:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-14 12:32:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:32:19,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:19,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:32:19,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1947653490, now seen corresponding path program 1 times [2022-12-14 12:32:19,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:19,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840138105] [2022-12-14 12:32:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:19,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840138105] [2022-12-14 12:32:19,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840138105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:19,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:32:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:32:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57727327] [2022-12-14 12:32:19,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:32:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:32:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:32:19,156 INFO L87 Difference]: Start difference. First operand 18 states and 19 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) [2022-12-14 12:32:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:19,170 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-12-14 12:32:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:32:19,171 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 [2022-12-14 12:32:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:19,171 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:32:19,171 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:32:19,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:32:19,172 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:19,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:32:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:32:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 12:32:19,174 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) [2022-12-14 12:32:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 12:32:19,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-12-14 12:32:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:19,174 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 12:32:19,174 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) [2022-12-14 12:32:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 12:32:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:32:19,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:19,175 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:19,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:32:19,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 247766020, now seen corresponding path program 1 times [2022-12-14 12:32:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:19,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796272330] [2022-12-14 12:32:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:19,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:19,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796272330] [2022-12-14 12:32:19,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796272330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:19,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560065083] [2022-12-14 12:32:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:19,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:19,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:19,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:32:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:32:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:19,564 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 [2022-12-14 12:32:19,595 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 [2022-12-14 12:32:19,646 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 [2022-12-14 12:32:19,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:19,747 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 15 [2022-12-14 12:32:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:20,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:20,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-12-14 12:32:20,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:20,134 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 30 [2022-12-14 12:32:20,146 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 [2022-12-14 12:32:20,154 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 [2022-12-14 12:32:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:20,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560065083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:20,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741544605] [2022-12-14 12:32:20,197 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:32:20,198 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:20,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:20,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:20,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:20,261 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 [2022-12-14 12:32:20,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:20,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:20,345 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 25 treesize of output 24 [2022-12-14 12:32:20,743 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:21,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '471#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:32:21,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:21,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:21,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-14 12:32:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484752217] [2022-12-14 12:32:21,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:32:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:32:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:32:21,744 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) [2022-12-14 12:32:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:22,202 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-12-14 12:32:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:32:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) Word has length 11 [2022-12-14 12:32:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:22,203 INFO L225 Difference]: With dead ends: 24 [2022-12-14 12:32:22,203 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 12:32:22,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:32:22,204 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:22,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 24 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:32:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 12:32:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-14 12:32:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 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) [2022-12-14 12:32:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 12:32:22,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 11 [2022-12-14 12:32:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:22,206 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 12:32:22,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) [2022-12-14 12:32:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 12:32:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:32:22,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:22,206 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:22,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:32:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:32:22,408 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)] === [2022-12-14 12:32:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 247768198, now seen corresponding path program 1 times [2022-12-14 12:32:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:22,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466512459] [2022-12-14 12:32:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:22,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466512459] [2022-12-14 12:32:22,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466512459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393634199] [2022-12-14 12:32:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:22,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:32:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 12:32:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:22,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:22,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:22,930 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 15 [2022-12-14 12:32:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:23,165 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 13 treesize of output 11 [2022-12-14 12:32:23,169 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 [2022-12-14 12:32:23,174 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 14 treesize of output 12 [2022-12-14 12:32:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:23,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393634199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:23,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234026983] [2022-12-14 12:32:23,188 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:32:23,188 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:23,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:23,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:23,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:23,212 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 [2022-12-14 12:32:23,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:23,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:23,281 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 25 treesize of output 24 [2022-12-14 12:32:23,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:24,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 12:32:24,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:24,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:24,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-14 12:32:24,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431717351] [2022-12-14 12:32:24,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:32:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:32:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:32:24,586 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2022-12-14 12:32:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:25,062 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-12-14 12:32:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:32:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) Word has length 11 [2022-12-14 12:32:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:25,063 INFO L225 Difference]: With dead ends: 38 [2022-12-14 12:32:25,063 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 12:32:25,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:32:25,064 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 17 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 [2022-12-14 12:32:25,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 17 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:32:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 12:32:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-12-14 12:32:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-12-14 12:32:25,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2022-12-14 12:32:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:25,067 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-12-14 12:32:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2022-12-14 12:32:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-12-14 12:32:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:32:25,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:25,070 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:25,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:32:25,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:25,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash 480863816, now seen corresponding path program 2 times [2022-12-14 12:32:25,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:25,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479691292] [2022-12-14 12:32:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:25,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479691292] [2022-12-14 12:32:25,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479691292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:25,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185165637] [2022-12-14 12:32:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:32:25,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:25,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:25,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:32:25,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:32:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:32:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 12:32:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:25,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:26,159 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-14 12:32:26,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 12:32:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:26,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:26,710 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 29 treesize of output 25 [2022-12-14 12:32:26,715 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 [2022-12-14 12:32:26,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-12-14 12:32:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185165637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103298700] [2022-12-14 12:32:26,739 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:32:26,739 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:26,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:26,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:26,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:26,763 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 [2022-12-14 12:32:26,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:26,812 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 25 treesize of output 24 [2022-12-14 12:32:27,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:28,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '835#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 12:32:28,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:28,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:28,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-12-14 12:32:28,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892063011] [2022-12-14 12:32:28,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:28,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 12:32:28,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 12:32:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 12:32:28,270 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2022-12-14 12:32:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:30,189 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-12-14 12:32:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:32:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 12:32:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:30,190 INFO L225 Difference]: With dead ends: 57 [2022-12-14 12:32:30,190 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 12:32:30,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=371, Invalid=2491, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:32:30,191 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:30,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 47 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:32:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 12:32:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-12-14 12:32:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 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) [2022-12-14 12:32:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-12-14 12:32:30,194 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2022-12-14 12:32:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:30,194 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-12-14 12:32:30,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 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) [2022-12-14 12:32:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-12-14 12:32:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:32:30,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:30,195 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 12:32:30,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:32:30,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:32:30,396 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)] === [2022-12-14 12:32:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:30,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1954350486, now seen corresponding path program 2 times [2022-12-14 12:32:30,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:30,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250974926] [2022-12-14 12:32:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:30,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:31,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250974926] [2022-12-14 12:32:31,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250974926] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:31,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412894851] [2022-12-14 12:32:31,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:32:31,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:31,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:31,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:32:31,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:32:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:32:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 12:32:31,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:31,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:31,196 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:32:31,197 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 16 treesize of output 22 [2022-12-14 12:32:31,200 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 [2022-12-14 12:32:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:31,767 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 12:32:31,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 57 [2022-12-14 12:32:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:31,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:32,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:32,683 INFO L350 Elim1Store]: Elim1 eliminated variable 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 47 treesize of output 36 [2022-12-14 12:32:32,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:32,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 61 [2022-12-14 12:32:32,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:32:32,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2022-12-14 12:32:32,728 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 22 treesize of output 18 [2022-12-14 12:32:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412894851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:32,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852627880] [2022-12-14 12:32:32,861 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:32:32,861 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:32,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:32,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:32,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:32,884 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 [2022-12-14 12:32:32,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:32,931 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 25 treesize of output 24 [2022-12-14 12:32:33,208 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:34,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:32:34,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:34,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:34,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2022-12-14 12:32:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607999291] [2022-12-14 12:32:34,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 12:32:34,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 12:32:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:32:34,540 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:40,540 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-12-14 12:32:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 12:32:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 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 17 [2022-12-14 12:32:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:40,540 INFO L225 Difference]: With dead ends: 101 [2022-12-14 12:32:40,541 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 12:32:40,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1034, Invalid=7708, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 12:32:40,542 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 375 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:40,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 27 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:32:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 12:32:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-12-14 12:32:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 94 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2022-12-14 12:32:40,546 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 17 [2022-12-14 12:32:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:40,546 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2022-12-14 12:32:40,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:32:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2022-12-14 12:32:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:32:40,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:40,547 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:40,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:32:40,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:32:40,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:32:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash 543381196, now seen corresponding path program 3 times [2022-12-14 12:32:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:40,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947641051] [2022-12-14 12:32:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:40,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:41,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947641051] [2022-12-14 12:32:41,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947641051] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:41,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656792687] [2022-12-14 12:32:41,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:32:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:41,208 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:32:41,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:32:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:32:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-14 12:32:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:41,284 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:32:41,284 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 [2022-12-14 12:32:41,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:53,227 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-14 12:32:53,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 39 [2022-12-14 12:32:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:53,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:54,012 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 59 treesize of output 51 [2022-12-14 12:32:54,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-12-14 12:32:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:54,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656792687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:54,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439404008] [2022-12-14 12:32:54,088 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:32:54,088 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:54,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:54,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:54,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:54,107 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 [2022-12-14 12:32:54,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:32:54,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:54,150 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 25 treesize of output 24 [2022-12-14 12:32:54,351 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:55,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~spanp~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post4#1.offset|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrcspn_~p~0#1.offset| 1) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0) (<= 1 |ULTIMATE.start_cstrcspn_~spanp~0#1.offset|))' at error location [2022-12-14 12:32:55,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:55,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:55,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 41 [2022-12-14 12:32:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452826473] [2022-12-14 12:32:55,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:55,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 12:32:55,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:55,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 12:32:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2309, Unknown=14, NotChecked=0, Total=2550 [2022-12-14 12:32:55,998 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:06,830 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] [2022-12-14 12:33:11,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:21,181 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 91 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:33:27,712 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 119 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:33:33,633 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:33:35,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:37,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:45,893 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 97 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:33:47,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:57,377 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 92 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:06,369 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification. DAG size of input: 131 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:12,264 WARN L233 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 87 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:15,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:34:22,473 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 93 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:31,742 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:32,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:34:43,775 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 133 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:44,544 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2022-12-14 12:34:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:34:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 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 23 [2022-12-14 12:34:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:44,545 INFO L225 Difference]: With dead ends: 119 [2022-12-14 12:34:44,545 INFO L226 Difference]: Without dead ends: 119 [2022-12-14 12:34:44,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 105.1s TimeCoverageRelationStatistics Valid=685, Invalid=4407, Unknown=20, NotChecked=0, Total=5112 [2022-12-14 12:34:44,546 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 216 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 4 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:44,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 77 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 517 Invalid, 11 Unknown, 0 Unchecked, 17.6s Time] [2022-12-14 12:34:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-14 12:34:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 50. [2022-12-14 12:34:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-12-14 12:34:44,549 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2022-12-14 12:34:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-12-14 12:34:44,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-12-14 12:34:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 12:34:44,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:44,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 12:34:44,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:34:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:44,753 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:34:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1331285998, now seen corresponding path program 1 times [2022-12-14 12:34:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270696405] [2022-12-14 12:34:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:44,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:34:44,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270696405] [2022-12-14 12:34:44,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270696405] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:34:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216676394] [2022-12-14 12:34:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:44,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:44,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:44,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:34:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:34:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:44,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:34:45,059 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 [2022-12-14 12:34:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:34:45,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:34:45,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216676394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227403875] [2022-12-14 12:34:45,121 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:34:45,121 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:45,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:45,122 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:45,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:45,146 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 [2022-12-14 12:34:45,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:34:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:45,195 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 25 treesize of output 24 [2022-12-14 12:34:45,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:46,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1977#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:46,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:46,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:34:46,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2022-12-14 12:34:46,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979436832] [2022-12-14 12:34:46,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:34:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:34:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-12-14 12:34:46,602 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:46,816 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-12-14 12:34:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:34:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 12:34:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:46,817 INFO L225 Difference]: With dead ends: 71 [2022-12-14 12:34:46,817 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 12:34:46,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:34:46,818 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:46,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 46 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 12:34:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-12-14 12:34:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-12-14 12:34:46,821 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 27 [2022-12-14 12:34:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:46,821 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-12-14 12:34:46,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-12-14 12:34:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 12:34:46,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:46,822 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 12:34:46,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:34:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:34:47,023 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)] === [2022-12-14 12:34:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 328493494, now seen corresponding path program 3 times [2022-12-14 12:34:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:47,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832324208] [2022-12-14 12:34:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:47,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832324208] [2022-12-14 12:34:47,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832324208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:34:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064135546] [2022-12-14 12:34:47,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:34:47,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:47,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:47,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:34:47,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:34:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:34:47,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 12:34:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:47,746 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 [2022-12-14 12:34:47,768 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 [2022-12-14 12:34:47,824 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 [2022-12-14 12:34:49,118 INFO L321 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2022-12-14 12:34:49,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2022-12-14 12:34:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:51,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:34:51,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2022-12-14 12:34:51,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:34:51,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 127 [2022-12-14 12:34:51,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-12-14 12:34:51,118 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 [2022-12-14 12:34:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:51,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064135546] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354047951] [2022-12-14 12:34:51,263 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:34:51,263 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:51,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:51,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:51,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:51,281 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 [2022-12-14 12:34:51,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:34:51,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:51,342 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 25 treesize of output 24 [2022-12-14 12:34:51,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:53,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2375#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:53,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:53,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:34:53,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 55 [2022-12-14 12:34:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991953153] [2022-12-14 12:34:53,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:53,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 12:34:53,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 12:34:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3877, Unknown=1, NotChecked=0, Total=4160 [2022-12-14 12:34:53,548 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:35:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:02,011 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-12-14 12:35:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 12:35:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 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 29 [2022-12-14 12:35:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:02,012 INFO L225 Difference]: With dead ends: 136 [2022-12-14 12:35:02,012 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 12:35:02,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1114, Invalid=9597, Unknown=1, NotChecked=0, Total=10712 [2022-12-14 12:35:02,014 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 341 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:02,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 180 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 12:35:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 12:35:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2022-12-14 12:35:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 129 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) [2022-12-14 12:35:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2022-12-14 12:35:02,018 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 29 [2022-12-14 12:35:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:02,018 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2022-12-14 12:35:02,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 56 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:35:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2022-12-14 12:35:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:35:02,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:02,019 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1] [2022-12-14 12:35:02,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 12:35:02,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:35:02,220 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)] === [2022-12-14 12:35:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:02,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2108199502, now seen corresponding path program 4 times [2022-12-14 12:35:02,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:02,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506079490] [2022-12-14 12:35:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:02,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 127 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:35:03,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506079490] [2022-12-14 12:35:03,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506079490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:35:03,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795348709] [2022-12-14 12:35:03,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:35:03,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:03,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:03,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:35:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 161 conjunts are in the unsatisfiable core [2022-12-14 12:35:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:03,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:35:03,528 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:35:03,528 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 16 treesize of output 22 [2022-12-14 12:35:03,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:35:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:08,060 INFO L321 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2022-12-14 12:35:08,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 84 treesize of output 80 [2022-12-14 12:35:08,066 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 12:35:08,076 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 12:35:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:35:08,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:35:14,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:35:14,530 INFO L350 Elim1Store]: Elim1 eliminated variable 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 185 treesize of output 108 [2022-12-14 12:35:14,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:35:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 212 treesize of output 223 [2022-12-14 12:35:14,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:35:14,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 147 [2022-12-14 12:35:14,653 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 [2022-12-14 12:35:14,738 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 12:35:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:35:14,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795348709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:35:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121363721] [2022-12-14 12:35:14,990 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:35:14,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:35:14,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:35:14,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:35:14,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:35:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:15,005 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 [2022-12-14 12:35:15,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:35:15,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:35:15,052 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 25 treesize of output 24 [2022-12-14 12:35:15,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:35:18,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3136#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~p~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrcspn_~p~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrcspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:35:18,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:35:18,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:35:18,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 38, 38] total 95 [2022-12-14 12:35:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528346760] [2022-12-14 12:35:18,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 12:35:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 12:35:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=10239, Unknown=1, NotChecked=0, Total=10920 [2022-12-14 12:35:18,094 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:35:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:50,302 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-12-14 12:35:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 12:35:50,302 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 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 53 [2022-12-14 12:35:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:50,303 INFO L225 Difference]: With dead ends: 145 [2022-12-14 12:35:50,303 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 12:35:50,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4711 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=3268, Invalid=25461, Unknown=1, NotChecked=0, Total=28730 [2022-12-14 12:35:50,306 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 542 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:50,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 524 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 12:35:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 12:35:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 12:35:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:35:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 12:35:50,307 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-12-14 12:35:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:50,307 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 12:35:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:35:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 12:35:50,307 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-12-14 12:35:50,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-12-14 12:35:50,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-14 12:35:50,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:35:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:35:50,519 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:50,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:35:50,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:35:50 BoogieIcfgContainer [2022-12-14 12:35:50,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:35:50,531 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:35:50,532 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:35:50,532 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:35:50,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:32:17" (3/4) ... [2022-12-14 12:35:50,540 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 12:35:50,555 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-12-14 12:35:50,556 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-12-14 12:35:50,556 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 12:35:50,556 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 12:35:50,580 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 12:35:50,580 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:35:50,581 INFO L158 Benchmark]: Toolchain (without parser) took 213691.41ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 85.3MB in the beginning and 30.3MB in the end (delta: 54.9MB). Peak memory consumption was 83.2MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,581 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:35:50,581 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.19ms. Allocated memory is still 119.5MB. Free memory was 85.3MB in the beginning and 69.4MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,581 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.97ms. Allocated memory is still 119.5MB. Free memory was 69.4MB in the beginning and 67.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,581 INFO L158 Benchmark]: Boogie Preprocessor took 19.00ms. Allocated memory is still 119.5MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,582 INFO L158 Benchmark]: RCFGBuilder took 304.68ms. Allocated memory is still 119.5MB. Free memory was 66.0MB in the beginning and 50.5MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,582 INFO L158 Benchmark]: TraceAbstraction took 212981.37ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 49.7MB in the beginning and 33.2MB in the end (delta: 16.5MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,582 INFO L158 Benchmark]: Witness Printer took 49.23ms. Allocated memory is still 144.7MB. Free memory was 33.2MB in the beginning and 30.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:35:50,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 119.5MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.19ms. Allocated memory is still 119.5MB. Free memory was 85.3MB in the beginning and 69.4MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.97ms. Allocated memory is still 119.5MB. Free memory was 69.4MB in the beginning and 67.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.00ms. Allocated memory is still 119.5MB. Free memory was 67.3MB in the beginning and 66.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 304.68ms. Allocated memory is still 119.5MB. Free memory was 66.0MB in the beginning and 50.5MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 212981.37ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 49.7MB in the beginning and 33.2MB in the end (delta: 16.5MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * Witness Printer took 49.23ms. Allocated memory is still 144.7MB. Free memory was 33.2MB in the beginning and 30.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 561]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 212.9s, OverallIterations: 17, TraceHistogramMax: 9, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 158.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 2049 SdHoareTripleChecker+Valid, 22.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2049 mSDsluCounter, 1069 SdHoareTripleChecker+Invalid, 22.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 948 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5519 IncrementalHoareTripleChecker+Invalid, 5633 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 121 mSDtfsCounter, 5519 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 884 GetRequests, 254 SyntacticMatches, 2 SemanticMatches, 628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10181 ImplicationChecksByTransitivity, 175.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=16, InterpolantAutomatonStates: 269, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 105 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 36.5s InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 569 ConstructedInterpolants, 116 QuantifiedInterpolants, 15981 SizeOfPredicates, 202 NumberOfNonLiveVariables, 1608 ConjunctsInSsa, 584 ConjunctsInUnsatCore, 33 InterpolantComputations, 9 PerfectInterpolantSequences, 214/954 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 12:35:50,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0693fa85-191e-47a8-a982-e3e1f2f2b1f2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE