./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/substring-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_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/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_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/substring-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/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_08ce450d-d9d8-4916-acbb-8e67d83803b8/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 79a0aa7f506a25068fe5f831c3bf60ccd6ee82a9d4cedb42c580c3cecf620506 --- 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 05:58:34,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:58:34,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:58:34,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:58:34,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:58:34,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:58:34,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:58:34,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:58:34,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:58:34,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:58:34,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:58:34,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:58:34,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:58:34,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:58:34,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:58:34,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:58:34,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:58:34,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:58:34,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:58:34,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:58:34,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:58:34,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:58:34,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:58:34,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:58:34,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:58:34,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:58:34,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:58:34,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:58:34,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:58:34,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:58:34,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:58:34,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:58:34,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:58:34,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:58:34,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:58:34,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:58:34,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:58:34,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:58:34,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:58:34,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:58:34,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:58:34,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2022-12-14 05:58:34,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:58:34,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:58:34,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:58:34,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:58:34,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:58:34,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:58:34,829 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:58:34,829 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:58:34,829 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:58:34,829 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:58:34,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:58:34,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:58:34,830 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:58:34,830 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:58:34,830 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:58:34,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:58:34,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:58:34,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:58:34,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:58:34,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:58:34,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:58:34,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:58:34,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:58:34,833 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:58:34,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:58:34,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:58:34,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:58:34,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:58:34,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:58:34,835 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:58:34,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:58:34,835 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:58:34,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:58:34,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:58:34,835 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_08ce450d-d9d8-4916-acbb-8e67d83803b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79a0aa7f506a25068fe5f831c3bf60ccd6ee82a9d4cedb42c580c3cecf620506 [2022-12-14 05:58:35,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:58:35,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:58:35,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:58:35,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:58:35,056 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:58:35,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-memory-alloca/substring-alloca-1.i [2022-12-14 05:58:37,587 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:58:37,757 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:58:37,758 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/sv-benchmarks/c/termination-memory-alloca/substring-alloca-1.i [2022-12-14 05:58:37,766 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/data/b086783d3/fbe7235951494ced86845996cd10f4d9/FLAG3b3e5851b [2022-12-14 05:58:38,175 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/data/b086783d3/fbe7235951494ced86845996cd10f4d9 [2022-12-14 05:58:38,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:58:38,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:58:38,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:58:38,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:58:38,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:58:38,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ed6f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38, skipping insertion in model container [2022-12-14 05:58:38,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:58:38,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:58:38,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:58:38,398 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:58:38,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:58:38,441 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:58:38,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38 WrapperNode [2022-12-14 05:58:38,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:58:38,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:58:38,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:58:38,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:58:38,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,469 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-12-14 05:58:38,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:58:38,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:58:38,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:58:38,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:58:38,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:58:38,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:58:38,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:58:38,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:58:38,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (1/1) ... [2022-12-14 05:58:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:58:38,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:38,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:58:38,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:58:38,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 05:58:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 05:58:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:58:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:58:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:58:38,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:58:38,636 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:58:38,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:58:38,793 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:58:38,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:58:38,849 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 05:58:38,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:58:38 BoogieIcfgContainer [2022-12-14 05:58:38,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:58:38,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:58:38,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:58:38,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:58:38,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:58:38" (1/3) ... [2022-12-14 05:58:38,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750f7bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:58:38, skipping insertion in model container [2022-12-14 05:58:38,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:58:38" (2/3) ... [2022-12-14 05:58:38,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750f7bbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:58:38, skipping insertion in model container [2022-12-14 05:58:38,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:58:38" (3/3) ... [2022-12-14 05:58:38,857 INFO L112 eAbstractionObserver]: Analyzing ICFG substring-alloca-1.i [2022-12-14 05:58:38,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:58:38,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 05:58:38,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:58:38,908 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;@45a30dff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:58:38,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-12-14 05:58:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) 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 05:58:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:58:38,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:38,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:58:38,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 3799, now seen corresponding path program 1 times [2022-12-14 05:58:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144672542] [2022-12-14 05:58:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,139 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 05:58:39,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144672542] [2022-12-14 05:58:39,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144672542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:58:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895566690] [2022-12-14 05:58:39,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:58:39,178 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) 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) 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 05:58:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,225 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-12-14 05:58:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:39,227 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 05:58:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,233 INFO L225 Difference]: With dead ends: 30 [2022-12-14 05:58:39,233 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 05:58:39,234 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 05:58:39,237 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 16 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 05:58:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 05:58:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-14 05:58:39,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2022-12-14 05:58:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,259 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-14 05:58:39,260 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 05:58:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-14 05:58:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:58:39,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:58:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:58:39,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 3800, now seen corresponding path program 1 times [2022-12-14 05:58:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893524135] [2022-12-14 05:58:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,440 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 05:58:39,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893524135] [2022-12-14 05:58:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893524135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:58:39,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991892851] [2022-12-14 05:58:39,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:39,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:58:39,443 INFO L87 Difference]: Start difference. First operand 29 states and 32 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 05:58:39,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,473 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 05:58:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:39,474 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 05:58:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,474 INFO L225 Difference]: With dead ends: 28 [2022-12-14 05:58:39,474 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 05:58:39,475 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 05:58:39,475 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 05:58:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 05:58:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 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 05:58:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-12-14 05:58:39,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2022-12-14 05:58:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,479 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-12-14 05:58:39,479 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 05:58:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-12-14 05:58:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:58:39,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:58:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:58:39,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,480 INFO L85 PathProgramCache]: Analyzing trace with hash 117758, now seen corresponding path program 1 times [2022-12-14 05:58:39,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30988181] [2022-12-14 05:58:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,540 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 05:58:39,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30988181] [2022-12-14 05:58:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30988181] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:58:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79430523] [2022-12-14 05:58:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:58:39,542 INFO L87 Difference]: Start difference. First operand 28 states and 31 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 05:58:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,565 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-12-14 05:58:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:39,566 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 05:58:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,566 INFO L225 Difference]: With dead ends: 27 [2022-12-14 05:58:39,566 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 05:58:39,567 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 05:58:39,567 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 05:58:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 05:58:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-14 05:58:39,570 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2022-12-14 05:58:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,570 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-14 05:58:39,571 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 05:58:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-14 05:58:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:58:39,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:58:39,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:58:39,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 117759, now seen corresponding path program 1 times [2022-12-14 05:58:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846809996] [2022-12-14 05:58:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,658 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 05:58:39,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846809996] [2022-12-14 05:58:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846809996] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:58:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086822998] [2022-12-14 05:58:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:58:39,660 INFO L87 Difference]: Start difference. First operand 27 states and 30 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 05:58:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,683 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 05:58:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:39,684 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 05:58:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,684 INFO L225 Difference]: With dead ends: 26 [2022-12-14 05:58:39,684 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:58:39,685 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 05:58:39,685 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:58:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 05:58:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 05:58:39,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2022-12-14 05:58:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,688 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 05:58:39,688 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 05:58:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 05:58:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:58:39,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:58:39,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:58:39,689 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 3652541, now seen corresponding path program 1 times [2022-12-14 05:58:39,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94997226] [2022-12-14 05:58:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,724 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 05:58:39,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94997226] [2022-12-14 05:58:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94997226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:58:39,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466649188] [2022-12-14 05:58:39,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:58:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:58:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:58:39,727 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,760 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-12-14 05:58:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:58:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 05:58:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,761 INFO L225 Difference]: With dead ends: 25 [2022-12-14 05:58:39,762 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 05:58:39,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:39,763 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 05:58:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 05:58:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 05:58:39,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2022-12-14 05:58:39,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,765 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 05:58:39,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 05:58:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:58:39,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:58:39,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:58:39,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash 3652542, now seen corresponding path program 1 times [2022-12-14 05:58:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385581900] [2022-12-14 05:58:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,832 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 05:58:39,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385581900] [2022-12-14 05:58:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385581900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:58:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772803143] [2022-12-14 05:58:39,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:58:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:58:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:39,834 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,883 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-12-14 05:58:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:58:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 05:58:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,884 INFO L225 Difference]: With dead ends: 46 [2022-12-14 05:58:39,884 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 05:58:39,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:58:39,885 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 05:58:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2022-12-14 05:58:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.8125) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 05:58:39,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 4 [2022-12-14 05:58:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 05:58:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 05:58:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:58:39,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:58:39,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:58:39,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -784875262, now seen corresponding path program 1 times [2022-12-14 05:58:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738447713] [2022-12-14 05:58:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:39,932 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 05:58:39,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738447713] [2022-12-14 05:58:39,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738447713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:39,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:39,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:58:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791464503] [2022-12-14 05:58:39,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:39,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:58:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:58:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:58:39,936 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:39,976 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-14 05:58:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:58:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:58:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:39,977 INFO L225 Difference]: With dead ends: 26 [2022-12-14 05:58:39,977 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:58:39,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:39,978 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:39,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:58:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-12-14 05:58:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) 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 05:58:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 05:58:39,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2022-12-14 05:58:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:39,980 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 05:58:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 05:58:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:58:39,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:39,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:58:39,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:58:39,981 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash -784875261, now seen corresponding path program 1 times [2022-12-14 05:58:39,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:39,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253505036] [2022-12-14 05:58:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,089 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 05:58:40,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253505036] [2022-12-14 05:58:40,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253505036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:58:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684045210] [2022-12-14 05:58:40,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:58:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:58:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:40,091 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,156 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-12-14 05:58:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:58:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:58:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,157 INFO L225 Difference]: With dead ends: 27 [2022-12-14 05:58:40,158 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 05:58:40,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 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 05:58:40,159 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:40,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 18 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 05:58:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-12-14 05:58:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 05:58:40,161 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2022-12-14 05:58:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,162 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 05:58:40,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 05:58:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:58:40,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:58:40,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1649093833, now seen corresponding path program 1 times [2022-12-14 05:58:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935535249] [2022-12-14 05:58:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,269 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 05:58:40,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935535249] [2022-12-14 05:58:40,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935535249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:58:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680325258] [2022-12-14 05:58:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:58:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:58:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:58:40,271 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,293 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 05:58:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:58:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:58:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,294 INFO L225 Difference]: With dead ends: 21 [2022-12-14 05:58:40,294 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 05:58:40,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:58:40,295 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:40,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 05:58:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 05:58:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 05:58:40,297 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2022-12-14 05:58:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,297 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 05:58:40,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 05:58:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:58:40,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 05:58:40,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -415636010, now seen corresponding path program 1 times [2022-12-14 05:58:40,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666387440] [2022-12-14 05:58:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:40,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666387440] [2022-12-14 05:58:40,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666387440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:58:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938623541] [2022-12-14 05:58:40,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:40,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:40,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:58:40,325 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,338 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 05:58:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:58:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,338 INFO L225 Difference]: With dead ends: 19 [2022-12-14 05:58:40,339 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 05:58:40,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:58:40,339 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 05:58:40,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 05:58:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 05:58:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 05:58:40,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2022-12-14 05:58:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,342 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 05:58:40,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 05:58:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:58:40,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:58:40,343 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash -415645084, now seen corresponding path program 1 times [2022-12-14 05:58:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268000632] [2022-12-14 05:58:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,400 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 05:58:40,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268000632] [2022-12-14 05:58:40,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268000632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:58:40,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289455425] [2022-12-14 05:58:40,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:58:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:58:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:40,402 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,438 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-12-14 05:58:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:58:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:58:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,439 INFO L225 Difference]: With dead ends: 19 [2022-12-14 05:58:40,439 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 05:58:40,439 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 05:58:40,440 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:40,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 05:58:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-12-14 05:58:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 05:58:40,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2022-12-14 05:58:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,442 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 05:58:40,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 05:58:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:58:40,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 05:58:40,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash -415645083, now seen corresponding path program 1 times [2022-12-14 05:58:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24395236] [2022-12-14 05:58:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,561 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 05:58:40,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24395236] [2022-12-14 05:58:40,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24395236] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:58:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448160119] [2022-12-14 05:58:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:58:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:58:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:58:40,563 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,634 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 05:58:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:58:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:58:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,635 INFO L225 Difference]: With dead ends: 40 [2022-12-14 05:58:40,636 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 05:58:40,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:58:40,636 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:40,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 11 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 05:58:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-12-14 05:58:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) 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 05:58:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 05:58:40,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 9 [2022-12-14 05:58:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,640 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 05:58:40,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 05:58:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:58:40,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 05:58:40,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash 5717669, now seen corresponding path program 1 times [2022-12-14 05:58:40,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986465415] [2022-12-14 05:58:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:40,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:40,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986465415] [2022-12-14 05:58:40,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986465415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:40,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:58:40,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:58:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621271322] [2022-12-14 05:58:40,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:40,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:58:40,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:40,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:58:40,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:58:40,700 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 05:58:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:40,732 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-12-14 05:58:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:58:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 05:58:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:40,733 INFO L225 Difference]: With dead ends: 25 [2022-12-14 05:58:40,733 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 05:58:40,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:58:40,734 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:40,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:58:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 05:58:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 05:58:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 05:58:40,737 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2022-12-14 05:58:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:40,737 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 05:58:40,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 05:58:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 05:58:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:58:40,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:40,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 05:58:40,738 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2932621, now seen corresponding path program 1 times [2022-12-14 05:58:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:40,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860530646] [2022-12-14 05:58:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:41,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860530646] [2022-12-14 05:58:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860530646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924598516] [2022-12-14 05:58:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:41,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:41,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:41,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:58:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 05:58:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:41,155 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 05:58:41,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:41,300 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 32 treesize of output 29 [2022-12-14 05:58:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:41,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:58:41,582 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 05:58:41,586 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 05:58:41,592 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 20 [2022-12-14 05:58:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:41,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924598516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:58:41,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1320507086] [2022-12-14 05:58:41,623 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 05:58:41,624 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:58:41,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:58:41,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:58:41,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:58:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:41,675 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 05:58:41,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 05:58:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:41,755 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 05:58:42,210 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:58:43,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '852#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~pt~0#1.base|) (+ |ULTIMATE.start_substring_~pt~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:58:43,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:58:43,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:58:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-14 05:58:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001916034] [2022-12-14 05:58:43,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:58:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:58:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:58:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-12-14 05:58:43,652 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:44,049 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-12-14 05:58:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:58:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 05:58:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:44,050 INFO L225 Difference]: With dead ends: 43 [2022-12-14 05:58:44,050 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 05:58:44,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:58:44,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 168 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:44,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 18 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:58:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 05:58:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-12-14 05:58:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-14 05:58:44,054 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 11 [2022-12-14 05:58:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:44,054 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-14 05:58:44,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-14 05:58:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 05:58:44,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:44,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:58:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:58:44,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1476683266, now seen corresponding path program 1 times [2022-12-14 05:58:44,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:44,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922569933] [2022-12-14 05:58:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:44,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:44,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922569933] [2022-12-14 05:58:44,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922569933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736472733] [2022-12-14 05:58:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:44,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:44,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:58:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 05:58:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:44,597 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 05:58:44,626 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 05:58:44,667 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 23 treesize of output 22 [2022-12-14 05:58:44,815 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-12-14 05:58:44,815 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 2 case distinctions, treesize of input 48 treesize of output 38 [2022-12-14 05:58:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:44,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:58:45,056 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-12-14 05:58:45,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2022-12-14 05:58:45,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:45,067 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 32 treesize of output 34 [2022-12-14 05:58:45,077 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 05:58:45,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:58:45,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:45,093 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 37 treesize of output 48 [2022-12-14 05:58:45,135 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 05:58:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736472733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:58:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040298671] [2022-12-14 05:58:45,165 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 05:58:45,166 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:58:45,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:58:45,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:58:45,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:58:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:45,185 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 05:58:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:58:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:45,240 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 05:58:45,757 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:58:47,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1037#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (< (select |#length| |ULTIMATE.start_substring_~ps~0#1.base|) (+ |ULTIMATE.start_substring_~ps~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:58:47,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:58:47,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:58:47,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 20 [2022-12-14 05:58:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124608232] [2022-12-14 05:58:47,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:58:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:58:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:58:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:58:47,075 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:47,738 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2022-12-14 05:58:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:58:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 05:58:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:47,739 INFO L225 Difference]: With dead ends: 91 [2022-12-14 05:58:47,739 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 05:58:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=363, Invalid=1707, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 05:58:47,740 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 426 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:47,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 32 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:58:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 05:58:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2022-12-14 05:58:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-12-14 05:58:47,743 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 13 [2022-12-14 05:58:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-12-14 05:58:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-12-14 05:58:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:58:47,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:47,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:47,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:58:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:58:47,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1465070347, now seen corresponding path program 1 times [2022-12-14 05:58:47,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:47,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411606991] [2022-12-14 05:58:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:48,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:48,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411606991] [2022-12-14 05:58:48,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411606991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:48,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827200216] [2022-12-14 05:58:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:48,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:48,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:48,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:48,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:58:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:48,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 05:58:48,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:48,301 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 05:58:48,322 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 05:58:48,363 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 05:58:48,641 INFO L321 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-12-14 05:58:48,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2022-12-14 05:58:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:48,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:58:51,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:51,112 INFO L350 Elim1Store]: Elim1 eliminated variable 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 62 treesize of output 40 [2022-12-14 05:58:51,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:51,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 114 [2022-12-14 05:58:51,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:58:51,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-12-14 05:58:51,152 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 05:58:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827200216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:58:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466415765] [2022-12-14 05:58:51,507 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 05:58:51,507 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:58:51,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:58:51,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:58:51,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:58:51,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:51,527 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 05:58:51,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:58:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:58:51,591 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 05:58:51,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:58:53,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1318#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:58:53,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:58:53,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:58:53,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-14 05:58:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485335526] [2022-12-14 05:58:53,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:58:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:58:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:58:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1256, Unknown=1, NotChecked=0, Total=1406 [2022-12-14 05:58:53,306 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:54,456 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2022-12-14 05:58:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:58:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 05:58:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:54,458 INFO L225 Difference]: With dead ends: 64 [2022-12-14 05:58:54,458 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 05:58:54,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=435, Invalid=2216, Unknown=1, NotChecked=0, Total=2652 [2022-12-14 05:58:54,460 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:54,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 19 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:58:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 05:58:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-12-14 05:58:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.2553191489361701) 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 05:58:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-12-14 05:58:54,464 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 14 [2022-12-14 05:58:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:54,464 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-12-14 05:58:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:58:54,464 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-12-14 05:58:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:58:54,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:54,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:54,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:58:54,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:58:54,666 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:58:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:54,666 INFO L85 PathProgramCache]: Analyzing trace with hash 816703235, now seen corresponding path program 2 times [2022-12-14 05:58:54,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:54,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388841239] [2022-12-14 05:58:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:54,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:55,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388841239] [2022-12-14 05:58:55,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388841239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014384026] [2022-12-14 05:58:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:58:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:55,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:55,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:58:55,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:58:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:58:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 05:58:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:55,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:58:59,437 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-12-14 05:58:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 05:58:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:58:59,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:58:59,990 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 27 treesize of output 23 [2022-12-14 05:59:00,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:00,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-12-14 05:59:00,007 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 83 treesize of output 65 [2022-12-14 05:59:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:00,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014384026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644620705] [2022-12-14 05:59:00,038 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 05:59:00,038 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:00,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:00,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:00,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:00,058 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 05:59:00,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:00,109 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 05:59:00,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:01,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1588#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~pt~0#1.base|) (+ |ULTIMATE.start_substring_~pt~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:01,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:01,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:01,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 27 [2022-12-14 05:59:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067148421] [2022-12-14 05:59:01,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:59:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:59:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1246, Unknown=2, NotChecked=0, Total=1406 [2022-12-14 05:59:01,783 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:03,926 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2022-12-14 05:59:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:59:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 05:59:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:03,927 INFO L225 Difference]: With dead ends: 114 [2022-12-14 05:59:03,928 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 05:59:03,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=409, Invalid=2241, Unknown=2, NotChecked=0, Total=2652 [2022-12-14 05:59:03,929 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 464 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:03,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 50 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:59:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 05:59:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2022-12-14 05:59:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 69 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 05:59:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-12-14 05:59:03,932 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 16 [2022-12-14 05:59:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:03,933 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-12-14 05:59:03,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-12-14 05:59:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:59:03,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:03,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:03,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:59:04,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:59:04,135 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:59:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:04,136 INFO L85 PathProgramCache]: Analyzing trace with hash 449897121, now seen corresponding path program 1 times [2022-12-14 05:59:04,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:04,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933219580] [2022-12-14 05:59:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:04,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:04,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933219580] [2022-12-14 05:59:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933219580] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144061558] [2022-12-14 05:59:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:04,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:04,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:04,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:59:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:59:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:04,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:04,385 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 8 treesize of output 6 [2022-12-14 05:59:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:04,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144061558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767572432] [2022-12-14 05:59:04,402 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 05:59:04,403 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:04,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:04,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:04,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:04,423 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 05:59:04,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:04,473 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 05:59:04,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:06,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1922#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_substring_~pt~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:06,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:06,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:06,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-14 05:59:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601872093] [2022-12-14 05:59:06,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:59:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:59:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:59:06,178 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 05:59:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:06,328 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2022-12-14 05:59:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:59:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 05:59:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:06,329 INFO L225 Difference]: With dead ends: 94 [2022-12-14 05:59:06,329 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 05:59:06,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:59:06,329 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:06,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 16 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:59:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 05:59:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-12-14 05:59:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 05:59:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-12-14 05:59:06,332 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 18 [2022-12-14 05:59:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:06,332 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-12-14 05:59:06,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 05:59:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-12-14 05:59:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 05:59:06,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:06,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:06,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:59:06,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:59:06,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:59:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash -582362011, now seen corresponding path program 2 times [2022-12-14 05:59:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:06,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776736194] [2022-12-14 05:59:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:06,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:07,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776736194] [2022-12-14 05:59:07,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776736194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841546460] [2022-12-14 05:59:07,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:59:07,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:07,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:07,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:07,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:59:07,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:59:07,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:59:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 05:59:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:07,082 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 05:59:07,103 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 05:59:07,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:59:07,776 INFO L321 Elim1Store]: treesize reduction 22, result has 80.9 percent of original size [2022-12-14 05:59:07,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 120 [2022-12-14 05:59:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:11,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:11,190 INFO L350 Elim1Store]: Elim1 eliminated variable 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 123 treesize of output 68 [2022-12-14 05:59:11,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:11,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 194 treesize of output 260 [2022-12-14 05:59:11,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:11,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 155 [2022-12-14 05:59:11,332 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 05:59:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:19,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841546460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458893161] [2022-12-14 05:59:19,018 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 05:59:19,018 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:19,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:19,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:19,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:19,034 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 05:59:19,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:19,080 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 05:59:19,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:21,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2261#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:21,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:21,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:21,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 38 [2022-12-14 05:59:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055406292] [2022-12-14 05:59:21,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 05:59:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 05:59:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2136, Unknown=13, NotChecked=0, Total=2352 [2022-12-14 05:59:21,206 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:26,391 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-12-14 05:59:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 05:59:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 05:59:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:26,392 INFO L225 Difference]: With dead ends: 102 [2022-12-14 05:59:26,392 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 05:59:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=880, Invalid=4807, Unknown=13, NotChecked=0, Total=5700 [2022-12-14 05:59:26,393 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 377 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:26,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 32 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:59:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 05:59:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2022-12-14 05:59:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 05:59:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-12-14 05:59:26,397 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 19 [2022-12-14 05:59:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:26,397 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-12-14 05:59:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-12-14 05:59:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 05:59:26,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:26,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:26,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:59:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:26,600 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:59:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 485257785, now seen corresponding path program 1 times [2022-12-14 05:59:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366561726] [2022-12-14 05:59:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:26,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:27,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366561726] [2022-12-14 05:59:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366561726] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719123072] [2022-12-14 05:59:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:27,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:27,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:59:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 05:59:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:27,188 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 05:59:27,213 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 05:59:27,259 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 05:59:27,822 INFO L321 Elim1Store]: treesize reduction 7, result has 88.1 percent of original size [2022-12-14 05:59:27,823 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 5 case distinctions, treesize of input 58 treesize of output 76 [2022-12-14 05:59:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:27,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:28,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:28,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 52 [2022-12-14 05:59:28,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:28,552 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 5 case distinctions, treesize of input 132 treesize of output 152 [2022-12-14 05:59:28,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:28,571 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 77 treesize of output 79 [2022-12-14 05:59:28,580 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 05:59:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719123072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049696013] [2022-12-14 05:59:28,818 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 05:59:28,818 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:28,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:28,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:28,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:28,831 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 05:59:28,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:28,885 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 05:59:29,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:31,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2675#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:31,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:31,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:31,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-12-14 05:59:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474484694] [2022-12-14 05:59:31,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 05:59:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 05:59:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1976, Unknown=1, NotChecked=0, Total=2162 [2022-12-14 05:59:31,249 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 05:59:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:39,706 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2022-12-14 05:59:39,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 05:59:39,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 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 05:59:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:39,707 INFO L225 Difference]: With dead ends: 165 [2022-12-14 05:59:39,707 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 05:59:39,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1966 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1098, Invalid=5873, Unknown=1, NotChecked=0, Total=6972 [2022-12-14 05:59:39,710 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 690 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:39,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 35 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:59:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 05:59:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2022-12-14 05:59:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.2583333333333333) internal successors, (151), 122 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 05:59:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2022-12-14 05:59:39,715 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 23 [2022-12-14 05:59:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:39,715 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2022-12-14 05:59:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 05:59:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2022-12-14 05:59:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 05:59:39,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:39,716 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:39,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 05:59:39,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 05:59:39,918 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:59:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash 657231107, now seen corresponding path program 3 times [2022-12-14 05:59:39,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:39,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467681430] [2022-12-14 05:59:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:39,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:40,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467681430] [2022-12-14 05:59:40,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467681430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917985922] [2022-12-14 05:59:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:59:40,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:40,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:40,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:59:40,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:59:40,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:59:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 05:59:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:40,413 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 05:59:40,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 05:59:40,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:41,206 INFO L321 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2022-12-14 05:59:41,207 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 62 treesize of output 61 [2022-12-14 05:59:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:41,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:42,006 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 05:59:42,012 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 91 treesize of output 77 [2022-12-14 05:59:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917985922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879589294] [2022-12-14 05:59:42,063 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 05:59:42,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:42,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:42,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:42,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:42,078 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 05:59:42,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 05:59:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:42,122 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 05:59:42,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:44,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3239#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~pt~0#1.base|) (+ |ULTIMATE.start_substring_~pt~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:44,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:44,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:44,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 40 [2022-12-14 05:59:44,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718808225] [2022-12-14 05:59:44,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:44,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 05:59:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 05:59:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:59:44,417 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:53,540 INFO L93 Difference]: Finished difference Result 347 states and 415 transitions. [2022-12-14 05:59:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:59:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 05:59:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:53,542 INFO L225 Difference]: With dead ends: 347 [2022-12-14 05:59:53,542 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 05:59:53,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=900, Invalid=5420, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 05:59:53,544 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 938 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:53,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 142 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 05:59:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 05:59:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 200. [2022-12-14 05:59:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 197 states have (on average 1.3147208121827412) internal successors, (259), 199 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 05:59:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 259 transitions. [2022-12-14 05:59:53,548 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 259 transitions. Word has length 26 [2022-12-14 05:59:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:53,548 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 259 transitions. [2022-12-14 05:59:53,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9024390243902438) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:59:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 259 transitions. [2022-12-14 05:59:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:59:53,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:53,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 05:59:53,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:59:53,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:53,750 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 05:59:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:53,751 INFO L85 PathProgramCache]: Analyzing trace with hash -697849938, now seen corresponding path program 1 times [2022-12-14 05:59:53,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:53,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948822977] [2022-12-14 05:59:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:53,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:54,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948822977] [2022-12-14 05:59:54,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948822977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:54,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321562905] [2022-12-14 05:59:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:54,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:54,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:54,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:54,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:59:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 05:59:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:54,402 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 05:59:54,418 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 05:59:54,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 05:59:54,718 INFO L321 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2022-12-14 05:59:54,718 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 25 treesize of output 25 [2022-12-14 05:59:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:59:54,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:55,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:55,081 INFO L350 Elim1Store]: Elim1 eliminated variable 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 45 treesize of output 34 [2022-12-14 05:59:55,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:59:55,093 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 58 treesize of output 57 [2022-12-14 05:59:55,097 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 21 treesize of output 15 [2022-12-14 05:59:55,104 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 05:59:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:59:55,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321562905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:55,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800530014] [2022-12-14 05:59:55,145 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 05:59:55,145 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:55,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:55,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:55,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:59:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:55,159 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 05:59:55,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 05:59:55,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:59:55,201 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 05:59:55,620 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:57,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4039#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (< (select |#length| |ULTIMATE.start_substring_~ps~0#1.base|) (+ |ULTIMATE.start_substring_~ps~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:57,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:57,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:57,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-12-14 05:59:57,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277719874] [2022-12-14 05:59:57,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:57,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:59:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:59:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1456, Unknown=1, NotChecked=0, Total=1640 [2022-12-14 05:59:57,296 INFO L87 Difference]: Start difference. First operand 200 states and 259 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:00:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:00:01,098 INFO L93 Difference]: Finished difference Result 287 states and 367 transitions. [2022-12-14 06:00:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 06:00:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:00:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:00:01,101 INFO L225 Difference]: With dead ends: 287 [2022-12-14 06:00:01,101 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 06:00:01,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=415, Invalid=2446, Unknown=1, NotChecked=0, Total=2862 [2022-12-14 06:00:01,103 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 376 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:00:01,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 75 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:00:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 06:00:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 187. [2022-12-14 06:00:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.326086956521739) internal successors, (244), 186 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 06:00:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 244 transitions. [2022-12-14 06:00:01,109 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 244 transitions. Word has length 27 [2022-12-14 06:00:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:00:01,109 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 244 transitions. [2022-12-14 06:00:01,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:00:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 244 transitions. [2022-12-14 06:00:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:00:01,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:00:01,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:00:01,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:00:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:00:01,312 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:00:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:00:01,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1007870369, now seen corresponding path program 2 times [2022-12-14 06:00:01,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:00:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596238703] [2022-12-14 06:00:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:00:01,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:00:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:00:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:00:01,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:00:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596238703] [2022-12-14 06:00:01,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596238703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:00:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11202899] [2022-12-14 06:00:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:00:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:00:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:00:01,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:00:01,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:00:02,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:00:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:00:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 06:00:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:00:02,007 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 06:00:02,032 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 06:00:02,071 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 06:00:10,017 INFO L321 Elim1Store]: treesize reduction 11, result has 89.9 percent of original size [2022-12-14 06:00:10,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 126 [2022-12-14 06:00:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:00:10,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:00:11,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:00:11,408 INFO L350 Elim1Store]: Elim1 eliminated variable 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 104 treesize of output 60 [2022-12-14 06:00:11,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:00:11,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 214 [2022-12-14 06:00:11,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:00:11,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 116 [2022-12-14 06:00:11,518 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 06:00:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:00:13,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11202899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:00:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064784119] [2022-12-14 06:00:13,761 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:00:13,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:00:13,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:00:13,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:00:13,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:00:13,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:00:13,775 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 06:00:13,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:00:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:00:13,830 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 06:00:14,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:00:16,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4752#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 06:00:16,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:00:16,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:00:16,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 39 [2022-12-14 06:00:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569441345] [2022-12-14 06:00:16,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:00:16,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 06:00:16,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:00:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 06:00:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2349, Unknown=10, NotChecked=0, Total=2550 [2022-12-14 06:00:16,633 INFO L87 Difference]: Start difference. First operand 187 states and 244 transitions. Second operand has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:00:31,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 06:00:33,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 06:01:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:04,695 INFO L93 Difference]: Finished difference Result 281 states and 342 transitions. [2022-12-14 06:01:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 06:01:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 06:01:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:04,696 INFO L225 Difference]: With dead ends: 281 [2022-12-14 06:01:04,696 INFO L226 Difference]: Without dead ends: 281 [2022-12-14 06:01:04,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=3013, Invalid=14269, Unknown=10, NotChecked=0, Total=17292 [2022-12-14 06:01:04,699 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1257 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:04,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 52 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1017 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 06:01:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-14 06:01:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 202. [2022-12-14 06:01:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 199 states have (on average 1.3015075376884422) internal successors, (259), 201 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 06:01:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 259 transitions. [2022-12-14 06:01:04,703 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 259 transitions. Word has length 28 [2022-12-14 06:01:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:04,703 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 259 transitions. [2022-12-14 06:01:04,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 259 transitions. [2022-12-14 06:01:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:01:04,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:04,704 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:04,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:01:04,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:04,906 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:01:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:04,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1182697883, now seen corresponding path program 3 times [2022-12-14 06:01:04,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489309592] [2022-12-14 06:01:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:05,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489309592] [2022-12-14 06:01:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489309592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047033278] [2022-12-14 06:01:05,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:01:05,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:05,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:05,385 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:05,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:01:05,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:01:05,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:01:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 06:01:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:05,461 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 06:01:05,490 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 06:01:05,538 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 23 treesize of output 22 [2022-12-14 06:01:07,599 INFO L321 Elim1Store]: treesize reduction 58, result has 83.1 percent of original size [2022-12-14 06:01:07,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 29 case distinctions, treesize of input 113 treesize of output 329 [2022-12-14 06:01:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:31,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:34,089 INFO L321 Elim1Store]: treesize reduction 356, result has 17.2 percent of original size [2022-12-14 06:01:34,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 1323 treesize of output 1205 [2022-12-14 06:01:34,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:34,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1099 treesize of output 1111 [2022-12-14 06:01:34,205 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 06:01:34,342 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 145 treesize of output 135 [2022-12-14 06:01:34,938 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 338 treesize of output 328 [2022-12-14 06:01:35,238 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 338 treesize of output 328 [2022-12-14 06:01:35,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:35,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 383 [2022-12-14 06:01:35,971 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 338 treesize of output 328 [2022-12-14 06:01:38,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:38,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 297 [2022-12-14 06:01:38,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:38,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 346 [2022-12-14 06:01:38,872 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:38,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 1 [2022-12-14 06:01:38,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 319 [2022-12-14 06:01:39,110 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 288 treesize of output 278 [2022-12-14 06:01:39,718 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 288 treesize of output 278 [2022-12-14 06:01:39,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 319 [2022-12-14 06:01:45,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:45,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 284 [2022-12-14 06:01:45,535 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 275 treesize of output 265 [2022-12-14 06:01:45,610 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 275 treesize of output 265 [2022-12-14 06:01:45,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:45,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 306 [2022-12-14 06:01:45,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 306 [2022-12-14 06:01:46,072 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 275 treesize of output 265 [2022-12-14 06:01:46,464 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 06:01:46,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 382 [2022-12-14 06:01:46,680 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:46,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 453 treesize of output 1 [2022-12-14 06:01:46,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:01:46,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 403 treesize of output 429 [2022-12-14 06:01:48,107 INFO L321 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-12-14 06:01:48,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 403 treesize of output 1 [2022-12-14 06:01:48,214 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:48,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 453 treesize of output 1 [2022-12-14 06:01:48,241 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:48,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 1 [2022-12-14 06:01:48,297 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:48,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 1 [2022-12-14 06:01:48,329 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 275 treesize of output 265 [2022-12-14 06:01:48,401 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 06:01:48,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1019 treesize of output 1 [2022-12-14 06:01:50,063 INFO L321 Elim1Store]: treesize reduction 20, result has 92.9 percent of original size [2022-12-14 06:01:50,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 1630 treesize of output 1503 [2022-12-14 06:03:01,024 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:03:01,174 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 06:03:01,427 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:03:01,546 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:03:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:02,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047033278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:03:02,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923980537] [2022-12-14 06:03:02,160 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:03:02,161 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:03:02,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:03:02,161 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:03:02,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:03:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:03:02,182 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 06:03:02,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 06:03:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:03:02,228 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 06:03:02,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:03:05,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5637#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) |ULTIMATE.start_substring_#t~short6#1| (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= (+ |ULTIMATE.start_substring_~pt~0#1.offset| 1) (select |#length| |ULTIMATE.start_substring_~pt~0#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_substring_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|)) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |ULTIMATE.start_substring_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|)) (= |#NULL.offset| 0) (= (select |#valid| |ULTIMATE.start_substring_~pt~0#1.base|) 1) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (not (= |ULTIMATE.start_substring_#t~mem3#1| 0)) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 06:03:05,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:03:05,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:03:05,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24, 24] total 60 [2022-12-14 06:03:05,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115353585] [2022-12-14 06:03:05,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:03:05,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 06:03:05,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:05,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 06:03:05,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=4688, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 06:03:05,205 INFO L87 Difference]: Start difference. First operand 202 states and 259 transitions. Second operand has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 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 06:03:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:03:20,531 INFO L93 Difference]: Finished difference Result 240 states and 293 transitions. [2022-12-14 06:03:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 06:03:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 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 06:03:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:03:20,532 INFO L225 Difference]: With dead ends: 240 [2022-12-14 06:03:20,532 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 06:03:20,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=2091, Invalid=13409, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 06:03:20,534 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 559 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:03:20,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 46 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 06:03:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 06:03:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 205. [2022-12-14 06:03:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 1.2821782178217822) internal successors, (259), 204 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 06:03:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 259 transitions. [2022-12-14 06:03:20,539 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 259 transitions. Word has length 29 [2022-12-14 06:03:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:03:20,540 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 259 transitions. [2022-12-14 06:03:20,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 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 06:03:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 259 transitions. [2022-12-14 06:03:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:03:20,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:03:20,541 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:03:20,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:03:20,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 06:03:20,742 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:03:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:03:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1072573639, now seen corresponding path program 3 times [2022-12-14 06:03:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:03:20,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041400628] [2022-12-14 06:03:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:03:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:03:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:03:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:21,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:03:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041400628] [2022-12-14 06:03:21,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041400628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:03:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838961220] [2022-12-14 06:03:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:03:21,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:03:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:03:21,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:03:21,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:03:21,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:03:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:03:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-14 06:03:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:03:21,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:03:21,409 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 06:03:21,410 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 23 treesize of output 22 [2022-12-14 06:03:23,393 INFO L321 Elim1Store]: treesize reduction 118, result has 62.3 percent of original size [2022-12-14 06:03:23,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 114 treesize of output 240 [2022-12-14 06:03:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:03:24,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:03:26,483 INFO L321 Elim1Store]: treesize reduction 251, result has 20.8 percent of original size [2022-12-14 06:03:26,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 1156 treesize of output 1020 [2022-12-14 06:03:26,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:03:26,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 817 treesize of output 809 [2022-12-14 06:03:26,584 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 06:03:26,669 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 154 treesize of output 142 [2022-12-14 06:03:26,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:03:26,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 425 treesize of output 417 [2022-12-14 06:03:27,078 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 338 treesize of output 328 [2022-12-14 06:03:27,342 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 338 treesize of output 328 [2022-12-14 06:03:28,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:03:28,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 585 treesize of output 579 [2022-12-14 06:03:28,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:03:28,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 398 treesize of output 402 [2022-12-14 06:03:28,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:03:28,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 342 [2022-12-14 06:03:29,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 278 [2022-12-14 06:03:29,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:03:29,466 INFO L321 Elim1Store]: treesize reduction 15, result has 92.5 percent of original size [2022-12-14 06:03:29,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 1051 treesize of output 899 [2022-12-14 06:04:12,043 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:04:12,120 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:04:12,415 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 06:04:12,661 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 06:04:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:13,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838961220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:04:13,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107585658] [2022-12-14 06:04:13,320 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:04:13,320 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:04:13,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:04:13,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:04:13,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:04:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:04:13,337 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 06:04:13,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:04:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:04:13,384 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 06:04:13,764 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:04:16,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6454#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~ps2~0#1.base|) (+ |ULTIMATE.start_substring_~ps2~0#1.offset| 1)) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 06:04:16,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:04:16,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:04:16,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25, 25] total 62 [2022-12-14 06:04:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244619647] [2022-12-14 06:04:16,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:04:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 06:04:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 06:04:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=4988, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 06:04:16,925 INFO L87 Difference]: Start difference. First operand 205 states and 259 transitions. Second operand has 64 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 63 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 06:05:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:21,016 INFO L93 Difference]: Finished difference Result 340 states and 393 transitions. [2022-12-14 06:05:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 06:05:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 63 states have internal predecessors, (99), 0 states have call successors, (0), 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 33 [2022-12-14 06:05:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:21,018 INFO L225 Difference]: With dead ends: 340 [2022-12-14 06:05:21,018 INFO L226 Difference]: Without dead ends: 340 [2022-12-14 06:05:21,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17149 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=6855, Invalid=43545, Unknown=0, NotChecked=0, Total=50400 [2022-12-14 06:05:21,023 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1964 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:21,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 41 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 06:05:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-12-14 06:05:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 205. [2022-12-14 06:05:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 1.2623762376237624) internal successors, (255), 204 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 06:05:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 255 transitions. [2022-12-14 06:05:21,028 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 255 transitions. Word has length 33 [2022-12-14 06:05:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:21,028 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 255 transitions. [2022-12-14 06:05:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 63 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 06:05:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 255 transitions. [2022-12-14 06:05:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:05:21,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:21,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 06:05:21,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 06:05:21,231 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:05:21,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:21,232 INFO L85 PathProgramCache]: Analyzing trace with hash -529517378, now seen corresponding path program 2 times [2022-12-14 06:05:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736302708] [2022-12-14 06:05:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:21,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:21,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736302708] [2022-12-14 06:05:21,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736302708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023429029] [2022-12-14 06:05:21,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:05:21,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:21,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:21,626 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:05:21,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:05:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:05:21,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 06:05:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:21,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 06:05:21,743 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 06:05:21,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 06:05:22,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:22,326 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 06:05:22,326 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 45 treesize of output 43 [2022-12-14 06:05:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:22,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:23,171 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 06:05:23,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:05:23,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 58 [2022-12-14 06:05:23,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:05:23,195 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 10 case distinctions, treesize of input 108 treesize of output 111 [2022-12-14 06:05:23,217 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 06:05:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:23,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023429029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113720167] [2022-12-14 06:05:23,296 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 06:05:23,296 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:05:23,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:05:23,296 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:05:23,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:05:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:23,311 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 06:05:23,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:05:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:23,352 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 06:05:23,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:05:25,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7588#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (< (select |#length| |ULTIMATE.start_substring_~ps~0#1.base|) (+ |ULTIMATE.start_substring_~ps~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 06:05:25,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:05:25,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:25,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 16] total 41 [2022-12-14 06:05:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643099292] [2022-12-14 06:05:25,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:25,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 06:05:25,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 06:05:25,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:05:25,694 INFO L87 Difference]: Start difference. First operand 205 states and 255 transitions. Second operand has 43 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 06:05:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:31,413 INFO L93 Difference]: Finished difference Result 432 states and 542 transitions. [2022-12-14 06:05:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 06:05:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 06:05:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:31,414 INFO L225 Difference]: With dead ends: 432 [2022-12-14 06:05:31,415 INFO L226 Difference]: Without dead ends: 432 [2022-12-14 06:05:31,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=854, Invalid=5466, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 06:05:31,415 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1066 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:31,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1066 Valid, 202 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:05:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-12-14 06:05:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 370. [2022-12-14 06:05:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 367 states have (on average 1.3079019073569482) internal successors, (480), 369 states have internal predecessors, (480), 0 states have call successors, (0), 0 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 06:05:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 480 transitions. [2022-12-14 06:05:31,420 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 480 transitions. Word has length 40 [2022-12-14 06:05:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:31,420 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 480 transitions. [2022-12-14 06:05:31,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.857142857142857) internal successors, (120), 42 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 06:05:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 480 transitions. [2022-12-14 06:05:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:05:31,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:31,421 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:31,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:31,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:31,622 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:05:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -557623037, now seen corresponding path program 4 times [2022-12-14 06:05:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:31,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888458932] [2022-12-14 06:05:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:31,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:32,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:32,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888458932] [2022-12-14 06:05:32,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888458932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:32,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819053870] [2022-12-14 06:05:32,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:05:32,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:32,208 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:05:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 06:05:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:32,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:05:34,896 INFO L321 Elim1Store]: treesize reduction 28, result has 68.5 percent of original size [2022-12-14 06:05:34,896 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 102 treesize of output 105 [2022-12-14 06:05:34,908 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 06:05:34,918 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 06:05:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:35,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:37,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2022-12-14 06:05:37,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 153 [2022-12-14 06:05:37,853 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-14 06:05:37,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-12-14 06:05:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:37,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819053870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:37,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978481582] [2022-12-14 06:05:37,883 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 06:05:37,883 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:05:37,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:05:37,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:05:37,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:05:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,894 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 06:05:37,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint 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 06:05:37,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,935 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 06:05:38,081 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:05:40,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8792#(and (<= |ULTIMATE.start_substring_#in~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~t#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (< (select |#length| |ULTIMATE.start_substring_~pt~0#1.base|) (+ |ULTIMATE.start_substring_~pt~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_#t~malloc14#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~ps~0#1.offset|) (<= |ULTIMATE.start_substring_~ps~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.base|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.base|) (<= |ULTIMATE.start_substring_~t#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps2~0#1.offset|) (<= 0 |ULTIMATE.start_substring_~ps~0#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_substring_#in~s#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_substring_~pt~0#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~t#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_substring_~s#1.offset|) (<= 0 |ULTIMATE.start_substring_#in~s#1.offset|) (= |ULTIMATE.start_main_#t~malloc14#1.offset| 0) (<= 0 |ULTIMATE.start_substring_#in~s#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_substring_~t#1.offset|) (<= 0 |ULTIMATE.start_substring_~pt~0#1.base|) (<= |ULTIMATE.start_substring_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 06:05:40,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:05:40,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:40,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27, 27] total 67 [2022-12-14 06:05:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903650387] [2022-12-14 06:05:40,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 06:05:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:05:40,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 06:05:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=5555, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 06:05:40,797 INFO L87 Difference]: Start difference. First operand 370 states and 480 transitions. Second operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 06:05:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:55,203 INFO L93 Difference]: Finished difference Result 1246 states and 1484 transitions. [2022-12-14 06:05:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 06:05:55,204 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 06:05:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:55,206 INFO L225 Difference]: With dead ends: 1246 [2022-12-14 06:05:55,206 INFO L226 Difference]: Without dead ends: 1246 [2022-12-14 06:05:55,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4553 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=2301, Invalid=15789, Unknown=0, NotChecked=0, Total=18090 [2022-12-14 06:05:55,207 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2036 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:55,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 438 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 06:05:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-12-14 06:05:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 687. [2022-12-14 06:05:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 684 states have (on average 1.3508771929824561) internal successors, (924), 686 states have internal predecessors, (924), 0 states have call successors, (0), 0 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 06:05:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 924 transitions. [2022-12-14 06:05:55,222 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 924 transitions. Word has length 46 [2022-12-14 06:05:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:55,222 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 924 transitions. [2022-12-14 06:05:55,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 06:05:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 924 transitions. [2022-12-14 06:05:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:05:55,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:55,223 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 06:05:55,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 06:05:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 06:05:55,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 06:05:55,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -203998747, now seen corresponding path program 4 times [2022-12-14 06:05:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:05:55,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468354655] [2022-12-14 06:05:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:05:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:56,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:05:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468354655] [2022-12-14 06:05:56,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468354655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269896351] [2022-12-14 06:05:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:05:56,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:56,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:56,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08ce450d-d9d8-4916-acbb-8e67d83803b8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:05:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:56,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-14 06:05:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:56,234 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 06:05:56,262 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 06:05:56,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 06:05:59,823 INFO L321 Elim1Store]: treesize reduction 68, result has 85.4 percent of original size [2022-12-14 06:05:59,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 40 case distinctions, treesize of input 120 treesize of output 448