./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- 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-b5237d8 [2022-11-22 01:14:25,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:14:25,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:14:25,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:14:25,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:14:25,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:14:25,713 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:14:25,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:14:25,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:14:25,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:14:25,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:14:25,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:14:25,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:14:25,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:14:25,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:14:25,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:14:25,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:14:25,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:14:25,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:14:25,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:14:25,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:14:25,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:14:25,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:14:25,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:14:25,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:14:25,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:14:25,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:14:25,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:14:25,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:14:25,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:14:25,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:14:25,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:14:25,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:14:25,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:14:25,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:14:25,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:14:25,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:14:25,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:14:25,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:14:25,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:14:25,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:14:25,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:14:25,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:14:25,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:14:25,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:14:25,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:14:25,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:14:25,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:14:25,838 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:14:25,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:14:25,839 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:14:25,839 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:14:25,840 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:14:25,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:14:25,840 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:14:25,840 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:14:25,841 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:14:25,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:14:25,841 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:14:25,841 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:14:25,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:14:25,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:14:25,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:14:25,843 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:14:25,843 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:14:25,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:14:25,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:14:25,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:14:25,844 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:14:25,844 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:14:25,845 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:14:25,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:14:25,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:14:25,845 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:14:25,846 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:14:25,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:14:25,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:14:25,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:14:25,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:14:25,847 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:14:25,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:14:25,847 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:14:25,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:14:25,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:14:25,848 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_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2022-11-22 01:14:26,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:14:26,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:14:26,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:14:26,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:14:26,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:14:26,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-11-22 01:14:29,258 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:14:29,491 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:14:29,492 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-11-22 01:14:29,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/data/6792938db/305811fe1f2d4b0282e411fc0e78d0c3/FLAGc1e34adae [2022-11-22 01:14:29,519 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/data/6792938db/305811fe1f2d4b0282e411fc0e78d0c3 [2022-11-22 01:14:29,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:14:29,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:14:29,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:14:29,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:14:29,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:14:29,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:29,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd1fb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29, skipping insertion in model container [2022-11-22 01:14:29,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:29,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:14:29,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:14:29,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:14:29,887 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:14:29,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:14:29,949 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:14:29,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29 WrapperNode [2022-11-22 01:14:29,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:14:29,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:14:29,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:14:29,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:14:29,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:29,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:29,997 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2022-11-22 01:14:29,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:14:29,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:14:29,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:14:29,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:14:30,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,056 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:14:30,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:14:30,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:14:30,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:14:30,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (1/1) ... [2022-11-22 01:14:30,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:14:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:30,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:14:30,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:14:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:14:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:14:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:14:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:14:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:14:30,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:14:30,289 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:14:30,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:14:30,615 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:14:30,697 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:14:30,697 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:14:30,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:14:30 BoogieIcfgContainer [2022-11-22 01:14:30,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:14:30,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:14:30,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:14:30,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:14:30,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:14:29" (1/3) ... [2022-11-22 01:14:30,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b02418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:14:30, skipping insertion in model container [2022-11-22 01:14:30,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:14:29" (2/3) ... [2022-11-22 01:14:30,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b02418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:14:30, skipping insertion in model container [2022-11-22 01:14:30,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:14:30" (3/3) ... [2022-11-22 01:14:30,709 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2022-11-22 01:14:30,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:14:30,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-22 01:14:30,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:14:30,818 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;@389e51de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:14:30,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-22 01:14:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 2.176470588235294) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:14:30,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:30,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:14:30,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:30,838 INFO L85 PathProgramCache]: Analyzing trace with hash 145849, now seen corresponding path program 1 times [2022-11-22 01:14:30,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:30,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278259377] [2022-11-22 01:14:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:31,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278259377] [2022-11-22 01:14:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278259377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:31,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:31,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:14:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025276581] [2022-11-22 01:14:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:31,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:14:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:14:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:31,302 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 2.176470588235294) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:31,385 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-22 01:14:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:14:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:31,403 INFO L225 Difference]: With dead ends: 29 [2022-11-22 01:14:31,404 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:14:31,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:31,409 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:31,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:14:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-22 01:14:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-22 01:14:31,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2022-11-22 01:14:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:31,448 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-22 01:14:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-22 01:14:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:14:31,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:31,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:14:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:14:31,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:31,454 INFO L85 PathProgramCache]: Analyzing trace with hash 145850, now seen corresponding path program 1 times [2022-11-22 01:14:31,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:31,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386205849] [2022-11-22 01:14:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:31,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386205849] [2022-11-22 01:14:31,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386205849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:31,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:31,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:14:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583603604] [2022-11-22 01:14:31,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:14:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:14:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:14:31,799 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:31,907 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-11-22 01:14:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:31,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:14:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:31,909 INFO L225 Difference]: With dead ends: 54 [2022-11-22 01:14:31,909 INFO L226 Difference]: Without dead ends: 54 [2022-11-22 01:14:31,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:31,911 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:31,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-22 01:14:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2022-11-22 01:14:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-22 01:14:31,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 3 [2022-11-22 01:14:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:31,919 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-22 01:14:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-22 01:14:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:14:31,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:31,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:14:31,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:14:31,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash 4613597, now seen corresponding path program 1 times [2022-11-22 01:14:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197353274] [2022-11-22 01:14:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:31,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:32,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:32,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197353274] [2022-11-22 01:14:32,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197353274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:32,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:32,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:14:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535711645] [2022-11-22 01:14:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:14:32,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:14:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:32,004 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:32,033 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-22 01:14:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-22 01:14:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:32,035 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:14:32,035 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 01:14:32,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:32,037 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 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 [2022-11-22 01:14:32,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 01:14:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-22 01:14:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-22 01:14:32,042 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 4 [2022-11-22 01:14:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:32,043 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-22 01:14:32,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-22 01:14:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:14:32,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:32,044 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-22 01:14:32,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:14:32,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash 140240430, now seen corresponding path program 1 times [2022-11-22 01:14:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:32,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501717617] [2022-11-22 01:14:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:32,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501717617] [2022-11-22 01:14:32,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501717617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:32,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040859735] [2022-11-22 01:14:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:32,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:32,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:32,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:14:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:14:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:32,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-22 01:14:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:14:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:32,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040859735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921493916] [2022-11-22 01:14:33,135 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-22 01:14:33,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:33,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:33,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:33,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:33,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:33,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:33,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:33,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:33,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:33,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '282#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_main_#t~nondet11#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:14:33,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:14:33,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:33,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 01:14:33,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123721689] [2022-11-22 01:14:33,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:14:33,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:14:33,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:14:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:14:33,756 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:33,956 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-22 01:14:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:14:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:14:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:33,957 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:14:33,958 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:14:33,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:14:33,959 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:33,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:14:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-22 01:14:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-22 01:14:33,962 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 5 [2022-11-22 01:14:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:33,963 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-22 01:14:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-22 01:14:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:14:33,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:33,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:14:33,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:14:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:34,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash 52575915, now seen corresponding path program 1 times [2022-11-22 01:14:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:34,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725375197] [2022-11-22 01:14:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:34,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:34,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725375197] [2022-11-22 01:14:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725375197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:34,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:34,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:14:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539909437] [2022-11-22 01:14:34,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:14:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:14:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:34,214 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:34,240 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-22 01:14:34,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:14:34,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:14:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:34,242 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:14:34,242 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 01:14:34,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:14:34,244 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:34,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 01:14:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-22 01:14:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 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) [2022-11-22 01:14:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-22 01:14:34,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 6 [2022-11-22 01:14:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:34,252 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-22 01:14:34,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-22 01:14:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:14:34,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:34,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:14:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:14:34,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 52575916, now seen corresponding path program 1 times [2022-11-22 01:14:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711466073] [2022-11-22 01:14:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:34,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:34,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711466073] [2022-11-22 01:14:34,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711466073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:34,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:34,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:14:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392802749] [2022-11-22 01:14:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:34,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:34,445 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-11-22 01:14:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:34,522 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-22 01:14:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:14:34,523 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 [2022-11-22 01:14:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:34,524 INFO L225 Difference]: With dead ends: 45 [2022-11-22 01:14:34,524 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 01:14:34,524 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 [2022-11-22 01:14:34,525 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:34,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 42 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 01:14:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-11-22 01:14:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.6) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-22 01:14:34,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 6 [2022-11-22 01:14:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:34,535 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-22 01:14:34,548 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) [2022-11-22 01:14:34,548 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-22 01:14:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:14:34,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:34,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:34,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:14:34,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1629926705, now seen corresponding path program 1 times [2022-11-22 01:14:34,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:34,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532745141] [2022-11-22 01:14:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:34,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532745141] [2022-11-22 01:14:34,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532745141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:34,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:34,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:14:34,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568281410] [2022-11-22 01:14:34,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:34,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:14:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:14:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:14:34,612 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:34,637 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-22 01:14:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:14:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:14:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:34,639 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:14:34,639 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 01:14:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:14:34,640 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 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 [2022-11-22 01:14:34,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 01:14:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-22 01:14:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-22 01:14:34,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2022-11-22 01:14:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:34,644 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-22 01:14:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-22 01:14:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:14:34,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:34,645 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:34,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:14:34,645 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1014085613, now seen corresponding path program 1 times [2022-11-22 01:14:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:34,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282042885] [2022-11-22 01:14:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:34,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282042885] [2022-11-22 01:14:34,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282042885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863839807] [2022-11-22 01:14:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:34,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:34,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:34,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:14:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:34,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:14:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:35,008 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:14:35,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-22 01:14:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:35,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:35,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863839807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84896946] [2022-11-22 01:14:35,478 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 01:14:35,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:35,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:35,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:35,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:35,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:35,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:35,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:35,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:35,783 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:14:35,784 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 87 treesize of output 86 [2022-11-22 01:14:35,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:35,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:35,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:36,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-22 01:14:36,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:14:36,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:36,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-22 01:14:36,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437385780] [2022-11-22 01:14:36,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:14:36,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:14:36,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:14:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:14:36,664 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:36,810 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-22 01:14:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:14:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:14:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:36,811 INFO L225 Difference]: With dead ends: 25 [2022-11-22 01:14:36,811 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 01:14:36,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:14:36,812 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:36,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 01:14:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-22 01:14:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-22 01:14:36,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 8 [2022-11-22 01:14:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:36,815 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-22 01:14:36,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-22 01:14:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:14:36,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:36,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:36,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:14:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:37,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash 245961244, now seen corresponding path program 1 times [2022-11-22 01:14:37,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:37,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68001421] [2022-11-22 01:14:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:37,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68001421] [2022-11-22 01:14:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68001421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:37,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:14:37,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579800089] [2022-11-22 01:14:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:37,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:14:37,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:14:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:14:37,097 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2022-11-22 01:14:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:37,148 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-22 01:14:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:14:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2022-11-22 01:14:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:37,149 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:14:37,149 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 01:14:37,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:14:37,150 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:37,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 01:14:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 01:14:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-22 01:14:37,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2022-11-22 01:14:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-22 01:14:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2022-11-22 01:14:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-22 01:14:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:14:37,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:37,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:37,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:14:37,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash 245961245, now seen corresponding path program 1 times [2022-11-22 01:14:37,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827642298] [2022-11-22 01:14:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:37,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:37,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:37,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827642298] [2022-11-22 01:14:37,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827642298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969769004] [2022-11-22 01:14:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:37,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:37,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:14:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:14:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:37,516 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 21 treesize of output 17 [2022-11-22 01:14:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:37,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969769004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:37,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559593086] [2022-11-22 01:14:37,538 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:14:37,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:37,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:37,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:37,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:37,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:37,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:37,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:37,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:37,779 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 91 treesize of output 83 [2022-11-22 01:14:37,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:37,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:37,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:38,024 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:14:38,025 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 25 treesize of output 24 [2022-11-22 01:14:38,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:39,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [559593086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:39,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:39,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 13 [2022-11-22 01:14:39,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475031974] [2022-11-22 01:14:39,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:39,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:14:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:14:39,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:14:39,358 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-11-22 01:14:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:39,485 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-22 01:14:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:14:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 [2022-11-22 01:14:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:39,487 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:14:39,487 INFO L226 Difference]: Without dead ends: 26 [2022-11-22 01:14:39,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:14:39,488 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:39,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:14:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-22 01:14:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-22 01:14:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) internal successors, (29), 24 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) [2022-11-22 01:14:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-22 01:14:39,491 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-11-22 01:14:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-22 01:14:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-11-22 01:14:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-22 01:14:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:14:39,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:39,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:14:39,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:39,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash 218534883, now seen corresponding path program 1 times [2022-11-22 01:14:39,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:39,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986451320] [2022-11-22 01:14:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:39,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:39,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986451320] [2022-11-22 01:14:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986451320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:39,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:39,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:14:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295619087] [2022-11-22 01:14:39,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:39,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:14:39,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:14:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:14:39,768 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:39,837 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-22 01:14:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:14:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 01:14:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:39,838 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:14:39,838 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 01:14:39,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:14:39,839 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:39,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 01:14:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-22 01:14:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-22 01:14:39,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-11-22 01:14:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:39,842 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-22 01:14:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-22 01:14:39,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:14:39,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:39,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:14:39,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash 218534884, now seen corresponding path program 1 times [2022-11-22 01:14:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:39,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598276205] [2022-11-22 01:14:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:40,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598276205] [2022-11-22 01:14:40,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598276205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038210310] [2022-11-22 01:14:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:40,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:40,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:40,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:14:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:14:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:40,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:40,330 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 21 treesize of output 17 [2022-11-22 01:14:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:40,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038210310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622589722] [2022-11-22 01:14:40,359 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-22 01:14:40,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:40,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:40,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:40,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:40,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:40,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:40,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:40,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:40,584 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:14:40,585 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 87 treesize of output 86 [2022-11-22 01:14:40,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:40,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:40,814 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:14:40,815 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 175 treesize of output 179 [2022-11-22 01:14:41,028 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:14:41,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:14:42,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1622589722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:46,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:46,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 6] total 23 [2022-11-22 01:14:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944341006] [2022-11-22 01:14:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:46,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:14:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:14:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:14:46,158 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:46,659 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-22 01:14:46,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:14:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 01:14:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:46,660 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:14:46,660 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 01:14:46,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:14:46,661 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:46,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:14:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 01:14:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-22 01:14:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-22 01:14:46,664 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2022-11-22 01:14:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:46,665 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-22 01:14:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-22 01:14:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:14:46,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:46,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:46,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 01:14:46,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:14:46,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:46,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1815390876, now seen corresponding path program 1 times [2022-11-22 01:14:46,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:46,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208958147] [2022-11-22 01:14:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:46,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:14:47,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208958147] [2022-11-22 01:14:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208958147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:14:47,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:14:47,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:14:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533426426] [2022-11-22 01:14:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:14:47,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:14:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:14:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:14:47,058 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:47,082 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-22 01:14:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:14:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:14:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:47,084 INFO L225 Difference]: With dead ends: 26 [2022-11-22 01:14:47,084 INFO L226 Difference]: Without dead ends: 23 [2022-11-22 01:14:47,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:14:47,087 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 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 [2022-11-22 01:14:47,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:14:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-22 01:14:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-22 01:14:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-22 01:14:47,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-11-22 01:14:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:47,094 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-22 01:14:47,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-22 01:14:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:14:47,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:47,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:14:47,098 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash -796716973, now seen corresponding path program 1 times [2022-11-22 01:14:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182406995] [2022-11-22 01:14:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:47,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182406995] [2022-11-22 01:14:47,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182406995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:47,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128017403] [2022-11-22 01:14:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:47,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:47,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:47,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:14:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-22 01:14:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:47,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:47,848 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:14:47,849 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 17 treesize of output 23 [2022-11-22 01:14:47,860 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 3 [2022-11-22 01:14:48,166 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 16 treesize of output 8 [2022-11-22 01:14:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:48,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:48,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-22 01:14:48,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:48,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-11-22 01:14:48,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:48,544 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 16 treesize of output 20 [2022-11-22 01:14:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:14:48,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128017403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:48,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968536999] [2022-11-22 01:14:48,938 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:14:48,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:48,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:48,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:48,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:48,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:49,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:49,051 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 [2022-11-22 01:14:49,081 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:49,132 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 91 treesize of output 83 [2022-11-22 01:14:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:49,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:49,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:49,346 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:14:49,346 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 25 treesize of output 24 [2022-11-22 01:14:50,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:55,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1236#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~sc~0#1| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 1 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 2 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|)) (and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|))) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1) (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-22 01:14:55,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:14:55,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:55,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 14] total 34 [2022-11-22 01:14:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519891797] [2022-11-22 01:14:55,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:14:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 01:14:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 01:14:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2086, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:14:55,098 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:56,359 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-22 01:14:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:14:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 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 17 [2022-11-22 01:14:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:56,360 INFO L225 Difference]: With dead ends: 45 [2022-11-22 01:14:56,361 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 01:14:56,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=432, Invalid=3350, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:14:56,363 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:56,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 106 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:14:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 01:14:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-22 01:14:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) 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) [2022-11-22 01:14:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-22 01:14:56,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-11-22 01:14:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:56,366 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-22 01:14:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:14:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-22 01:14:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:14:56,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:56,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:14:56,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:14:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:14:56,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:14:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -336862777, now seen corresponding path program 2 times [2022-11-22 01:14:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:56,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190501563] [2022-11-22 01:14:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:14:56,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:56,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190501563] [2022-11-22 01:14:56,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190501563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:56,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808252381] [2022-11-22 01:14:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:14:56,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:56,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:56,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:14:56,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:14:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:14:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-22 01:14:56,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:56,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:57,017 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:14:57,017 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 17 treesize of output 23 [2022-11-22 01:14:57,026 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 3 [2022-11-22 01:14:57,411 INFO L321 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-11-22 01:14:57,411 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 44 treesize of output 46 [2022-11-22 01:14:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:14:57,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:57,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-22 01:14:57,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:57,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-11-22 01:14:57,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:14:58,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:14:58,013 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 16 treesize of output 20 [2022-11-22 01:14:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:14:58,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808252381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:58,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632016583] [2022-11-22 01:14:58,165 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:14:58,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:58,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:58,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:58,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:58,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:58,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:14:58,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:58,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:58,397 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:14:58,400 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 87 treesize of output 86 [2022-11-22 01:14:58,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:58,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:14:58,616 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:14:58,616 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 175 treesize of output 179 [2022-11-22 01:14:58,798 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:14:58,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:15:00,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:03,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1484#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:03,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:03,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:03,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-11-22 01:15:03,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931545743] [2022-11-22 01:15:03,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:03,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 01:15:03,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 01:15:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:15:03,568 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:05,425 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-22 01:15:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:15:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:15:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:05,426 INFO L225 Difference]: With dead ends: 50 [2022-11-22 01:15:05,426 INFO L226 Difference]: Without dead ends: 50 [2022-11-22 01:15:05,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=633, Invalid=3149, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:15:05,428 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 364 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:05,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 37 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:15:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-22 01:15:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-11-22 01:15:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-22 01:15:05,436 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 19 [2022-11-22 01:15:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:05,436 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-22 01:15:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-22 01:15:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:15:05,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:05,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:05,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 01:15:05,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:05,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1852725578, now seen corresponding path program 1 times [2022-11-22 01:15:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470259557] [2022-11-22 01:15:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:05,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:05,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:05,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470259557] [2022-11-22 01:15:05,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470259557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:05,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147486611] [2022-11-22 01:15:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:05,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:05,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:05,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:15:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:15:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:06,216 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 [2022-11-22 01:15:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:06,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:15:06,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-22 01:15:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:06,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:06,513 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 [2022-11-22 01:15:06,516 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 [2022-11-22 01:15:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:06,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147486611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466678314] [2022-11-22 01:15:06,734 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:15:06,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:06,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:06,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:06,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:06,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:06,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:06,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:06,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:06,916 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 91 treesize of output 83 [2022-11-22 01:15:06,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:07,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:07,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:07,104 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:15:07,105 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 25 treesize of output 24 [2022-11-22 01:15:07,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:10,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1764#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:10,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:10,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:10,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-22 01:15:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096429258] [2022-11-22 01:15:10,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:15:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:15:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 01:15:10,482 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:11,169 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-11-22 01:15:11,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:15:11,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-22 01:15:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:11,171 INFO L225 Difference]: With dead ends: 67 [2022-11-22 01:15:11,171 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 01:15:11,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=396, Invalid=2360, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:15:11,173 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:11,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 117 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:15:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 01:15:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-11-22 01:15:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-11-22 01:15:11,176 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 20 [2022-11-22 01:15:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:11,177 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-11-22 01:15:11,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-11-22 01:15:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:15:11,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:11,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:11,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:11,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:15:11,385 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1860873210, now seen corresponding path program 1 times [2022-11-22 01:15:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:11,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860535927] [2022-11-22 01:15:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:11,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:15:11,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860535927] [2022-11-22 01:15:11,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860535927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329917403] [2022-11-22 01:15:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:11,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:11,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:11,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:15:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:15:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:15:11,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:11,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:15:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:15:12,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329917403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:12,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1123255328] [2022-11-22 01:15:12,025 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:15:12,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:12,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:12,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:12,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:12,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:12,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,224 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 91 treesize of output 83 [2022-11-22 01:15:12,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:12,417 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:15:12,418 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 25 treesize of output 24 [2022-11-22 01:15:13,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:16,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2073#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:16,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:16,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:16,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-22 01:15:16,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323054631] [2022-11-22 01:15:16,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:16,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:15:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:15:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:15:16,548 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:16,885 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-22 01:15:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:15:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 01:15:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:16,886 INFO L225 Difference]: With dead ends: 65 [2022-11-22 01:15:16,886 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 01:15:16,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:15:16,888 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:16,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 31 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 01:15:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-11-22 01:15:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-22 01:15:16,902 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 22 [2022-11-22 01:15:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:16,902 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-22 01:15:16,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-22 01:15:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:15:16,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:16,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:16,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:17,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:15:17,113 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:17,113 INFO L85 PathProgramCache]: Analyzing trace with hash -83051875, now seen corresponding path program 2 times [2022-11-22 01:15:17,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:17,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63903022] [2022-11-22 01:15:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:17,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:17,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63903022] [2022-11-22 01:15:17,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63903022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173401672] [2022-11-22 01:15:17,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:15:17,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:17,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:17,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:17,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:15:17,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:15:17,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 01:15:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:17,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:17,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:15:17,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-22 01:15:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:15:17,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:18,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-22 01:15:18,232 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 20 treesize of output 16 [2022-11-22 01:15:18,237 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 [2022-11-22 01:15:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:15:18,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173401672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2021731880] [2022-11-22 01:15:18,279 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:15:18,279 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:18,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:18,280 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:18,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:18,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:18,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:18,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:18,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:18,472 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:15:18,472 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 87 treesize of output 86 [2022-11-22 01:15:18,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:18,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:18,654 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:15:18,654 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 175 treesize of output 179 [2022-11-22 01:15:18,814 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:15:18,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:15:20,284 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:23,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2378#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:23,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:23,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:23,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2022-11-22 01:15:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081792298] [2022-11-22 01:15:23,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:23,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:15:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:15:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:15:23,897 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:25,111 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-11-22 01:15:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:15:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 01:15:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:25,114 INFO L225 Difference]: With dead ends: 82 [2022-11-22 01:15:25,114 INFO L226 Difference]: Without dead ends: 82 [2022-11-22 01:15:25,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:15:25,116 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 115 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:25,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 88 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:15:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-22 01:15:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2022-11-22 01:15:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.173913043478261) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-11-22 01:15:25,123 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 22 [2022-11-22 01:15:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:25,125 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-11-22 01:15:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-11-22 01:15:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 01:15:25,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:25,128 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:25,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:15:25,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -594383901, now seen corresponding path program 3 times [2022-11-22 01:15:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777164304] [2022-11-22 01:15:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:25,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:25,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777164304] [2022-11-22 01:15:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777164304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:25,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793498244] [2022-11-22 01:15:25,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:15:25,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:25,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:25,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:15:25,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:15:25,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 01:15:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:26,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:26,334 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-11-22 01:15:26,334 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 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-22 01:15:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:26,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:26,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-22 01:15:26,533 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 29 treesize of output 23 [2022-11-22 01:15:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:26,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793498244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:26,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043309549] [2022-11-22 01:15:26,744 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:15:26,744 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:26,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:26,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:26,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:26,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:26,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:26,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:26,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:26,938 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 91 treesize of output 83 [2022-11-22 01:15:26,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:27,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:27,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:27,117 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:15:27,117 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 25 treesize of output 24 [2022-11-22 01:15:27,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:30,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2756#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:30,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:30,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:30,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-11-22 01:15:30,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091815095] [2022-11-22 01:15:30,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:30,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-22 01:15:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-22 01:15:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 01:15:30,744 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:32,616 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-11-22 01:15:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:15:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-22 01:15:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:32,618 INFO L225 Difference]: With dead ends: 113 [2022-11-22 01:15:32,618 INFO L226 Difference]: Without dead ends: 113 [2022-11-22 01:15:32,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=713, Invalid=4689, Unknown=0, NotChecked=0, Total=5402 [2022-11-22 01:15:32,621 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 214 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:32,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 209 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:15:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-22 01:15:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-11-22 01:15:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-22 01:15:32,625 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 26 [2022-11-22 01:15:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:32,625 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-22 01:15:32,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-22 01:15:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:15:32,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:32,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:32,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:32,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:32,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash -806177142, now seen corresponding path program 4 times [2022-11-22 01:15:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246768528] [2022-11-22 01:15:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:33,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:33,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246768528] [2022-11-22 01:15:33,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246768528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:33,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433175773] [2022-11-22 01:15:33,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:15:33,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:33,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:33,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:15:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:15:33,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:33,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:33,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 01:15:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:33,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433175773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318469112] [2022-11-22 01:15:33,783 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:15:33,783 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:33,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:33,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:33,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:33,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:33,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:33,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:33,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:33,959 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:15:33,959 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 87 treesize of output 86 [2022-11-22 01:15:34,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:34,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:34,133 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:15:34,133 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 175 treesize of output 179 [2022-11-22 01:15:34,276 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:15:34,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:15:35,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:39,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3225#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:39,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:39,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:39,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-22 01:15:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859177023] [2022-11-22 01:15:39,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 01:15:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 01:15:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:15:39,162 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:39,749 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2022-11-22 01:15:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:15:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-22 01:15:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:39,750 INFO L225 Difference]: With dead ends: 130 [2022-11-22 01:15:39,750 INFO L226 Difference]: Without dead ends: 130 [2022-11-22 01:15:39,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:15:39,752 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:39,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 213 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:15:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-22 01:15:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2022-11-22 01:15:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-11-22 01:15:39,756 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 28 [2022-11-22 01:15:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:39,757 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-11-22 01:15:39,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-11-22 01:15:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 01:15:39,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:39,758 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:39,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:39,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash 41791155, now seen corresponding path program 3 times [2022-11-22 01:15:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:39,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531932496] [2022-11-22 01:15:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:15:40,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531932496] [2022-11-22 01:15:40,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531932496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305945421] [2022-11-22 01:15:40,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:15:40,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:40,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:15:40,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:15:40,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-22 01:15:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:40,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:15:40,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-22 01:15:41,213 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 01:15:41,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-22 01:15:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:15:41,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:41,352 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_437) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-11-22 01:15:41,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:15:41,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:15:41,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:15:41,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-22 01:15:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:15:41,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305945421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903008300] [2022-11-22 01:15:41,567 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:15:41,568 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:41,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:41,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:41,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:41,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:41,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-11-22 01:15:41,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:41,901 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:15:41,901 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 25 treesize of output 24 [2022-11-22 01:15:42,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:47,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3713#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~sc~0#1| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 1 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 2 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|)) (and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|))) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1) (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:47,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:47,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:47,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-11-22 01:15:47,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086184324] [2022-11-22 01:15:47,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:47,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:15:47,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:15:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1680, Unknown=1, NotChecked=82, Total=1892 [2022-11-22 01:15:47,081 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:48,341 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-11-22 01:15:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:15:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-22 01:15:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:48,343 INFO L225 Difference]: With dead ends: 170 [2022-11-22 01:15:48,343 INFO L226 Difference]: Without dead ends: 141 [2022-11-22 01:15:48,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=283, Invalid=2690, Unknown=1, NotChecked=106, Total=3080 [2022-11-22 01:15:48,344 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 125 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:48,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 151 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-11-22 01:15:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-22 01:15:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-11-22 01:15:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.1605839416058394) internal successors, (159), 138 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2022-11-22 01:15:48,348 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 31 [2022-11-22 01:15:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:48,349 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2022-11-22 01:15:48,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2022-11-22 01:15:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 01:15:48,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:48,350 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:48,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:48,556 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:15:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1794201264, now seen corresponding path program 5 times [2022-11-22 01:15:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690339255] [2022-11-22 01:15:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:49,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690339255] [2022-11-22 01:15:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690339255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90132757] [2022-11-22 01:15:49,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:15:49,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:49,779 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:49,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:15:49,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:15:49,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 01:15:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:49,944 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:15:49,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:15:50,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:15:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:50,925 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2022-11-22 01:15:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:50,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:51,415 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 [2022-11-22 01:15:51,420 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 [2022-11-22 01:15:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:15:52,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90132757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:52,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74698972] [2022-11-22 01:15:52,004 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:15:52,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:52,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:52,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:52,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:52,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:52,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:15:52,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:15:52,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:52,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:52,184 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 91 treesize of output 83 [2022-11-22 01:15:52,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:52,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:52,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:15:52,404 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:15:52,405 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 25 treesize of output 24 [2022-11-22 01:15:52,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:56,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4289#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:56,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:56,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:15:56,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 43 [2022-11-22 01:15:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113674803] [2022-11-22 01:15:56,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-22 01:15:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-22 01:15:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2022-11-22 01:15:56,334 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:02,972 INFO L93 Difference]: Finished difference Result 223 states and 247 transitions. [2022-11-22 01:16:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 01:16:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 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 32 [2022-11-22 01:16:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:02,976 INFO L225 Difference]: With dead ends: 223 [2022-11-22 01:16:02,977 INFO L226 Difference]: Without dead ends: 207 [2022-11-22 01:16:02,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2464 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1525, Invalid=8777, Unknown=0, NotChecked=0, Total=10302 [2022-11-22 01:16:02,980 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 601 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:02,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 268 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:16:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-22 01:16:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2022-11-22 01:16:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 179 states have (on average 1.1620111731843576) internal successors, (208), 180 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 208 transitions. [2022-11-22 01:16:02,986 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 208 transitions. Word has length 32 [2022-11-22 01:16:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:02,986 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 208 transitions. [2022-11-22 01:16:02,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 208 transitions. [2022-11-22 01:16:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:16:02,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:02,987 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:02,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:03,193 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:16:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -518986457, now seen corresponding path program 4 times [2022-11-22 01:16:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:03,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992847891] [2022-11-22 01:16:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:16:03,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992847891] [2022-11-22 01:16:03,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992847891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:16:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206772810] [2022-11-22 01:16:03,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:16:03,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:03,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:03,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:03,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:16:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:03,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 01:16:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:03,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:16:04,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:04,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-22 01:16:04,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 01:16:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:16:04,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:04,317 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-22 01:16:04,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:16:04,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 01:16:04,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:16:04,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-22 01:16:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:16:04,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206772810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646182216] [2022-11-22 01:16:04,497 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:16:04,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:04,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:04,498 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:04,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:04,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:04,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:16:04,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:16:04,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:04,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:16:04,679 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:16:04,679 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 87 treesize of output 86 [2022-11-22 01:16:04,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:04,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:04,880 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:16:04,880 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 175 treesize of output 179 [2022-11-22 01:16:05,056 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:16:05,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:16:06,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:09,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5014#(and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:09,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:09,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:16:09,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-11-22 01:16:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253350778] [2022-11-22 01:16:09,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:09,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 01:16:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 01:16:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1369, Unknown=1, NotChecked=74, Total=1560 [2022-11-22 01:16:09,324 INFO L87 Difference]: Start difference. First operand 181 states and 208 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:10,435 INFO L93 Difference]: Finished difference Result 317 states and 358 transitions. [2022-11-22 01:16:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:16:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-22 01:16:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:10,438 INFO L225 Difference]: With dead ends: 317 [2022-11-22 01:16:10,438 INFO L226 Difference]: Without dead ends: 291 [2022-11-22 01:16:10,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=265, Invalid=2494, Unknown=1, NotChecked=102, Total=2862 [2022-11-22 01:16:10,439 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:10,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 367 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 579 Invalid, 2 Unknown, 42 Unchecked, 0.4s Time] [2022-11-22 01:16:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-22 01:16:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 278. [2022-11-22 01:16:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.1594202898550725) internal successors, (320), 277 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 320 transitions. [2022-11-22 01:16:10,449 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 320 transitions. Word has length 33 [2022-11-22 01:16:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:10,449 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 320 transitions. [2022-11-22 01:16:10,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 320 transitions. [2022-11-22 01:16:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 01:16:10,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:10,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:10,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:10,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 01:16:10,657 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:16:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1510435228, now seen corresponding path program 1 times [2022-11-22 01:16:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186188550] [2022-11-22 01:16:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:16:10,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:10,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186188550] [2022-11-22 01:16:10,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186188550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:16:10,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791299375] [2022-11-22 01:16:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:10,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:10,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:10,819 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:10,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:16:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 01:16:10,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:16:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:11,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 01:16:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:16:11,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791299375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:11,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064663766] [2022-11-22 01:16:11,460 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:16:11,460 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:11,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:11,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:11,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:16:11,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,648 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 91 treesize of output 83 [2022-11-22 01:16:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:11,823 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:16:11,823 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 25 treesize of output 24 [2022-11-22 01:16:12,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:16,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5866#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (or (and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|)) (and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~sc~0#1| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 1 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 2 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|))) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1) (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:16,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:16,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:16:16,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-22 01:16:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153821905] [2022-11-22 01:16:16,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:16:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:16:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:16:16,712 INFO L87 Difference]: Start difference. First operand 278 states and 320 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:18,190 INFO L93 Difference]: Finished difference Result 375 states and 416 transitions. [2022-11-22 01:16:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-22 01:16:18,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2022-11-22 01:16:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:18,192 INFO L225 Difference]: With dead ends: 375 [2022-11-22 01:16:18,192 INFO L226 Difference]: Without dead ends: 304 [2022-11-22 01:16:18,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=723, Invalid=5129, Unknown=0, NotChecked=0, Total=5852 [2022-11-22 01:16:18,194 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 236 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:18,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 67 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:16:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-22 01:16:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2022-11-22 01:16:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 232 states have (on average 1.1637931034482758) internal successors, (270), 233 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 270 transitions. [2022-11-22 01:16:18,201 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 270 transitions. Word has length 33 [2022-11-22 01:16:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:18,202 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 270 transitions. [2022-11-22 01:16:18,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 270 transitions. [2022-11-22 01:16:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 01:16:18,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:18,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:18,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-22 01:16:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 01:16:18,409 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:16:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1883235657, now seen corresponding path program 6 times [2022-11-22 01:16:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750711378] [2022-11-22 01:16:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:16:18,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750711378] [2022-11-22 01:16:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750711378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:16:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561560513] [2022-11-22 01:16:18,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:16:18,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:18,935 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:16:19,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:16:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-22 01:16:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:16:19,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:19,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 01:16:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:16:19,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561560513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005781376] [2022-11-22 01:16:19,647 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:16:19,647 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:19,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:19,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:19,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:19,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:16:19,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:19,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:19,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:19,835 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 91 treesize of output 83 [2022-11-22 01:16:19,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:19,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:20,017 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:16:20,018 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 25 treesize of output 24 [2022-11-22 01:16:20,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:23,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6799#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:23,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:23,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:16:23,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-11-22 01:16:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381633633] [2022-11-22 01:16:23,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:16:23,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:16:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:16:23,420 INFO L87 Difference]: Start difference. First operand 234 states and 270 transitions. Second operand has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:24,373 INFO L93 Difference]: Finished difference Result 332 states and 375 transitions. [2022-11-22 01:16:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:16:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-22 01:16:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:24,375 INFO L225 Difference]: With dead ends: 332 [2022-11-22 01:16:24,375 INFO L226 Difference]: Without dead ends: 332 [2022-11-22 01:16:24,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=479, Invalid=2943, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 01:16:24,376 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 222 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:24,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 264 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:16:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-22 01:16:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 254. [2022-11-22 01:16:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.1666666666666667) internal successors, (294), 253 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 294 transitions. [2022-11-22 01:16:24,383 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 294 transitions. Word has length 34 [2022-11-22 01:16:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:24,383 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 294 transitions. [2022-11-22 01:16:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.433333333333333) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 294 transitions. [2022-11-22 01:16:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 01:16:24,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:24,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:24,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:24,590 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:16:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1739607707, now seen corresponding path program 5 times [2022-11-22 01:16:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:24,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184576298] [2022-11-22 01:16:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:24,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:16:24,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184576298] [2022-11-22 01:16:24,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184576298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:16:24,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217851612] [2022-11-22 01:16:24,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:16:24,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:24,951 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:24,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:16:25,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:16:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:16:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:25,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-22 01:16:25,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:25,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-22 01:16:26,336 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-22 01:16:26,336 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 28 treesize of output 39 [2022-11-22 01:16:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:16:26,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:27,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:16:27,425 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-22 01:16:27,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:16:27,455 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 58 treesize of output 73 [2022-11-22 01:16:27,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:16:27,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:16:27,480 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 21 treesize of output 25 [2022-11-22 01:16:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:16:27,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217851612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:27,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851935373] [2022-11-22 01:16:27,825 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:16:27,825 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:27,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:27,825 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:27,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:27,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:16:27,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:16:27,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:27,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:27,992 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 91 treesize of output 83 [2022-11-22 01:16:28,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:28,081 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:28,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:16:28,156 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:16:28,157 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 25 treesize of output 24 [2022-11-22 01:16:28,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:33,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7674#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (or (and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~sc~0#1| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 1 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset| 1) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 2 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|)) (and (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post2#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|))) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_cstrpbrk_#t~post2#1.offset| 1) (select |#length| |ULTIMATE.start_cstrpbrk_#t~post2#1.base|))) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:33,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:33,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:16:33,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 41 [2022-11-22 01:16:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331192913] [2022-11-22 01:16:33,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 01:16:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:33,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 01:16:33,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2824, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 01:16:33,572 INFO L87 Difference]: Start difference. First operand 254 states and 294 transitions. Second operand has 43 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:50,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:02,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:06,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 01:17:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:07,067 INFO L93 Difference]: Finished difference Result 283 states and 317 transitions. [2022-11-22 01:17:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 01:17:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 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 35 [2022-11-22 01:17:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:07,068 INFO L225 Difference]: With dead ends: 283 [2022-11-22 01:17:07,068 INFO L226 Difference]: Without dead ends: 178 [2022-11-22 01:17:07,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=1232, Invalid=6775, Unknown=3, NotChecked=0, Total=8010 [2022-11-22 01:17:07,070 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 510 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:07,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 151 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 536 Invalid, 4 Unknown, 0 Unchecked, 8.4s Time] [2022-11-22 01:17:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-22 01:17:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 107. [2022-11-22 01:17:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 106 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2022-11-22 01:17:07,075 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 35 [2022-11-22 01:17:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:07,075 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2022-11-22 01:17:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.4523809523809526) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2022-11-22 01:17:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:17:07,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:07,076 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:07,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:17:07,288 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:17:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash 704917245, now seen corresponding path program 7 times [2022-11-22 01:17:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:07,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229650393] [2022-11-22 01:17:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:07,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229650393] [2022-11-22 01:17:07,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229650393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398091972] [2022-11-22 01:17:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:17:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:07,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:07,912 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:07,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:17:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-22 01:17:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 01:17:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:08,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:08,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-22 01:17:08,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:17:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:08,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398091972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973391433] [2022-11-22 01:17:08,658 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:17:08,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:08,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:08,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:08,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:17:08,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:08,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:08,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:08,827 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:17:08,828 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 87 treesize of output 86 [2022-11-22 01:17:08,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:08,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:09,008 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:17:09,008 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 175 treesize of output 179 [2022-11-22 01:17:09,143 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:17:09,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:17:10,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:14,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8401#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:14,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:14,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:14,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2022-11-22 01:17:14,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776027724] [2022-11-22 01:17:14,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:17:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:17:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:17:14,360 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:15,417 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2022-11-22 01:17:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:17:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 01:17:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:15,418 INFO L225 Difference]: With dead ends: 208 [2022-11-22 01:17:15,418 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 01:17:15,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 01:17:15,419 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:15,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 190 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:17:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 01:17:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2022-11-22 01:17:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2022-11-22 01:17:15,423 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 38 [2022-11-22 01:17:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:15,424 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2022-11-22 01:17:15,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2022-11-22 01:17:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 01:17:15,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:15,425 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:15,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 01:17:15,631 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:17:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2067876060, now seen corresponding path program 8 times [2022-11-22 01:17:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149188415] [2022-11-22 01:17:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:16,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149188415] [2022-11-22 01:17:16,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149188415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326387552] [2022-11-22 01:17:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:16,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:16,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:17:16,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:17:16,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-22 01:17:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:16,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:17:17,615 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-11-22 01:17:17,615 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 35 treesize of output 59 [2022-11-22 01:17:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:17:17,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:19,569 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 44 treesize of output 38 [2022-11-22 01:17:19,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:19,592 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 56 treesize of output 76 [2022-11-22 01:17:19,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-22 01:17:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:17:20,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326387552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212654368] [2022-11-22 01:17:20,213 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:17:20,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:20,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:20,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:20,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:20,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:17:20,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:20,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:20,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:20,389 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:17:20,390 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 87 treesize of output 86 [2022-11-22 01:17:20,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:20,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:20,554 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:17:20,555 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 175 treesize of output 179 [2022-11-22 01:17:20,721 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:17:20,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:17:21,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:27,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9065#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:27,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:27,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:27,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 20] total 56 [2022-11-22 01:17:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478393040] [2022-11-22 01:17:27,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 01:17:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 01:17:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=4554, Unknown=0, NotChecked=0, Total=4970 [2022-11-22 01:17:27,081 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:33,879 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2022-11-22 01:17:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 01:17:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-22 01:17:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:33,881 INFO L225 Difference]: With dead ends: 176 [2022-11-22 01:17:33,881 INFO L226 Difference]: Without dead ends: 176 [2022-11-22 01:17:33,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1638, Invalid=9704, Unknown=0, NotChecked=0, Total=11342 [2022-11-22 01:17:33,883 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 495 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:33,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 127 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:17:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-22 01:17:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2022-11-22 01:17:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1418918918918919) internal successors, (169), 148 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2022-11-22 01:17:33,888 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 40 [2022-11-22 01:17:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:33,888 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2022-11-22 01:17:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 57 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2022-11-22 01:17:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:17:33,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:33,890 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:33,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 01:17:34,096 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:17:34,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:34,096 INFO L85 PathProgramCache]: Analyzing trace with hash -413302922, now seen corresponding path program 9 times [2022-11-22 01:17:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703158374] [2022-11-22 01:17:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:34,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:35,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703158374] [2022-11-22 01:17:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703158374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102239346] [2022-11-22 01:17:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:17:35,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:35,262 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:35,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:17:35,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:17:35,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 01:17:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:35,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:42,701 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-22 01:17:42,701 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 38 treesize of output 26 [2022-11-22 01:17:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 54 proven. 48 refuted. 11 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:17:42,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:44,273 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 46 treesize of output 40 [2022-11-22 01:17:44,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:17:44,277 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 46 treesize of output 34 [2022-11-22 01:17:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:17:44,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102239346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225236802] [2022-11-22 01:17:44,638 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:17:44,638 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:44,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:44,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:44,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:44,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:17:44,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:44,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:44,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:44,804 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 91 treesize of output 83 [2022-11-22 01:17:44,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:44,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:44,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:44,980 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-22 01:17:44,981 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 25 treesize of output 24 [2022-11-22 01:17:45,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:49,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9840#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:49,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:49,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:49,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 58 [2022-11-22 01:17:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752860570] [2022-11-22 01:17:49,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 01:17:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 01:17:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4837, Unknown=11, NotChecked=0, Total=5112 [2022-11-22 01:17:49,917 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:55,822 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-11-22 01:17:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:17:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-22 01:17:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:55,829 INFO L225 Difference]: With dead ends: 268 [2022-11-22 01:17:55,829 INFO L226 Difference]: Without dead ends: 168 [2022-11-22 01:17:55,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=857, Invalid=9434, Unknown=11, NotChecked=0, Total=10302 [2022-11-22 01:17:55,835 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 259 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:55,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 319 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:17:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-22 01:17:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2022-11-22 01:17:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1363636363636365) internal successors, (175), 154 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2022-11-22 01:17:55,845 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 52 [2022-11-22 01:17:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:55,845 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2022-11-22 01:17:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 58 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:17:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2022-11-22 01:17:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:17:55,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:55,846 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:55,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:17:56,047 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:17:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash 897005405, now seen corresponding path program 10 times [2022-11-22 01:17:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:56,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274109628] [2022-11-22 01:17:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:17:57,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274109628] [2022-11-22 01:17:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274109628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603649106] [2022-11-22 01:17:57,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:17:57,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:57,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:57,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:57,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:17:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-22 01:17:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:57,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:58,568 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 01:17:58,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-22 01:17:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:17:58,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:59,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-22 01:17:59,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:17:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:17:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603649106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218703161] [2022-11-22 01:17:59,358 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:17:59,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:59,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:59,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:59,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:59,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:17:59,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:59,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:59,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:17:59,562 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:17:59,562 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 87 treesize of output 86 [2022-11-22 01:17:59,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:59,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:17:59,741 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:17:59,741 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 175 treesize of output 179 [2022-11-22 01:17:59,919 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:17:59,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:18:01,075 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:06,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10707#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:06,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:06,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:06,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2022-11-22 01:18:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229800003] [2022-11-22 01:18:06,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-22 01:18:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-22 01:18:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4090, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 01:18:06,241 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 52 states, 52 states have (on average 2.519230769230769) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:11,029 INFO L93 Difference]: Finished difference Result 292 states and 322 transitions. [2022-11-22 01:18:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 01:18:11,030 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.519230769230769) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-22 01:18:11,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:11,031 INFO L225 Difference]: With dead ends: 292 [2022-11-22 01:18:11,031 INFO L226 Difference]: Without dead ends: 174 [2022-11-22 01:18:11,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=694, Invalid=8812, Unknown=0, NotChecked=0, Total=9506 [2022-11-22 01:18:11,033 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:11,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 652 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:18:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-22 01:18:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 161. [2022-11-22 01:18:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.13125) internal successors, (181), 160 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2022-11-22 01:18:11,039 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 54 [2022-11-22 01:18:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:11,039 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2022-11-22 01:18:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.519230769230769) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2022-11-22 01:18:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 01:18:11,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:11,041 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:11,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:11,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:11,254 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:18:11,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1677889924, now seen corresponding path program 11 times [2022-11-22 01:18:11,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:11,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707297217] [2022-11-22 01:18:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:11,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:12,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707297217] [2022-11-22 01:18:12,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707297217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:12,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572306801] [2022-11-22 01:18:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:12,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:12,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:12,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:18:12,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-22 01:18:12,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:12,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-22 01:18:12,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:12,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:13,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 01:18:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:13,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:13,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-22 01:18:13,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:18:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572306801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895703291] [2022-11-22 01:18:13,388 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:18:13,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:13,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:13,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:13,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:13,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:13,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:18:13,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:13,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:13,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:18:13,560 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:18:13,560 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 87 treesize of output 86 [2022-11-22 01:18:13,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:13,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:13,728 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:18:13,728 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 175 treesize of output 179 [2022-11-22 01:18:13,885 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:18:13,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:18:14,998 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:20,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11608#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:20,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:20,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:20,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 40 [2022-11-22 01:18:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116882909] [2022-11-22 01:18:20,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 01:18:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 01:18:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2663, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:18:20,165 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:22,263 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2022-11-22 01:18:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-22 01:18:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-22 01:18:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:22,265 INFO L225 Difference]: With dead ends: 316 [2022-11-22 01:18:22,265 INFO L226 Difference]: Without dead ends: 180 [2022-11-22 01:18:22,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=643, Invalid=6329, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 01:18:22,266 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 247 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:22,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 569 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:18:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-22 01:18:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2022-11-22 01:18:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 166 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2022-11-22 01:18:22,272 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 56 [2022-11-22 01:18:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:22,273 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2022-11-22 01:18:22,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2022-11-22 01:18:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 01:18:22,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:22,274 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:22,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:22,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:22,475 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:18:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 488635883, now seen corresponding path program 12 times [2022-11-22 01:18:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:22,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051728877] [2022-11-22 01:18:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:22,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:23,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051728877] [2022-11-22 01:18:23,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051728877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:23,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39093305] [2022-11-22 01:18:23,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:18:23,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:23,620 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:23,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:18:23,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:18:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-22 01:18:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:24,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:24,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 01:18:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:25,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39093305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:25,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823182952] [2022-11-22 01:18:25,011 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:18:25,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:25,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:25,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:25,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:25,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:18:25,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:25,112 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:25,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:18:25,201 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:18:25,201 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 87 treesize of output 86 [2022-11-22 01:18:25,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:25,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:25,412 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:18:25,412 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 175 treesize of output 179 [2022-11-22 01:18:25,605 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:18:25,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:18:26,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:31,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12554#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:31,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:31,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:31,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 46 [2022-11-22 01:18:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245975482] [2022-11-22 01:18:31,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-22 01:18:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-22 01:18:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3334, Unknown=0, NotChecked=0, Total=3660 [2022-11-22 01:18:31,463 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:32,951 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2022-11-22 01:18:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:18:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 01:18:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:32,952 INFO L225 Difference]: With dead ends: 221 [2022-11-22 01:18:32,952 INFO L226 Difference]: Without dead ends: 221 [2022-11-22 01:18:32,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=924, Invalid=5396, Unknown=0, NotChecked=0, Total=6320 [2022-11-22 01:18:32,953 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 455 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:32,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 383 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:18:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-22 01:18:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 179. [2022-11-22 01:18:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 178 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2022-11-22 01:18:32,960 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 58 [2022-11-22 01:18:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:32,960 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2022-11-22 01:18:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.630434782608696) internal successors, (121), 47 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2022-11-22 01:18:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 01:18:32,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:32,962 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:32,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:33,168 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:18:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1905743921, now seen corresponding path program 13 times [2022-11-22 01:18:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:33,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434184756] [2022-11-22 01:18:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:34,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434184756] [2022-11-22 01:18:34,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434184756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161511107] [2022-11-22 01:18:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:18:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:34,188 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:34,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:18:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-22 01:18:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:34,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:34,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 01:18:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:34,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:35,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-22 01:18:35,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:18:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:35,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161511107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225969334] [2022-11-22 01:18:35,231 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:18:35,231 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:35,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:35,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:35,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:35,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:18:35,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:18:35,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:35,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:18:35,414 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:18:35,415 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 87 treesize of output 86 [2022-11-22 01:18:35,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:35,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:35,578 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:18:35,578 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 175 treesize of output 179 [2022-11-22 01:18:35,738 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:18:35,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:18:36,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:42,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13415#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:42,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:42,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:42,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 43 [2022-11-22 01:18:42,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397224295] [2022-11-22 01:18:42,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 01:18:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 01:18:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2985, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 01:18:42,029 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:44,421 INFO L93 Difference]: Finished difference Result 352 states and 388 transitions. [2022-11-22 01:18:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 01:18:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-22 01:18:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:44,422 INFO L225 Difference]: With dead ends: 352 [2022-11-22 01:18:44,423 INFO L226 Difference]: Without dead ends: 198 [2022-11-22 01:18:44,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=696, Invalid=7314, Unknown=0, NotChecked=0, Total=8010 [2022-11-22 01:18:44,424 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:44,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 719 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:18:44,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-22 01:18:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2022-11-22 01:18:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.125) internal successors, (207), 184 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2022-11-22 01:18:44,430 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 62 [2022-11-22 01:18:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:44,430 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2022-11-22 01:18:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2022-11-22 01:18:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 01:18:44,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:44,431 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:44,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 01:18:44,642 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:18:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1969906856, now seen corresponding path program 14 times [2022-11-22 01:18:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539881119] [2022-11-22 01:18:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 56 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:18:45,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539881119] [2022-11-22 01:18:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539881119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808323635] [2022-11-22 01:18:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:18:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:45,552 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:45,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:18:46,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-22 01:18:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:46,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 01:18:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:46,087 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:18:46,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-22 01:18:46,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-22 01:18:46,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:18:46,898 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 24 treesize of output 21 [2022-11-22 01:18:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-22 01:18:47,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:47,897 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 [2022-11-22 01:18:47,902 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 [2022-11-22 01:18:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-22 01:18:48,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808323635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470037303] [2022-11-22 01:18:48,065 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:18:48,065 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:48,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:48,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:48,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:48,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-22 01:18:48,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:48,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:48,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:18:48,277 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:18:48,277 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 87 treesize of output 86 [2022-11-22 01:18:48,329 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 [2022-11-22 01:18:48,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 01:18:48,448 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-11-22 01:18:48,448 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 175 treesize of output 179 [2022-11-22 01:18:48,635 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-11-22 01:18:48,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 324 treesize of output 339 [2022-11-22 01:18:49,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:54,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14449#(and (<= 0 |ULTIMATE.start_cstrpbrk_~scanp~0#1.base|) (<= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrpbrk_~scanp~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s2#1.offset| 0) (<= |ULTIMATE.start_cstrpbrk_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.offset|) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_cstrpbrk_~s1#1.offset| 1) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s2#1.offset|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (+ |ULTIMATE.start_cstrpbrk_#t~post4#1.offset| 1)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#t~post4#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:54,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:54,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:54,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7, 7] total 37 [2022-11-22 01:18:54,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525211037] [2022-11-22 01:18:54,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:54,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:18:54,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:54,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:18:54,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:18:54,945 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:58,544 INFO L93 Difference]: Finished difference Result 238 states and 260 transitions. [2022-11-22 01:18:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:18:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-22 01:18:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:58,545 INFO L225 Difference]: With dead ends: 238 [2022-11-22 01:18:58,545 INFO L226 Difference]: Without dead ends: 0 [2022-11-22 01:18:58,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1148, Invalid=5824, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 01:18:58,546 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 641 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:58,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 386 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:18:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-22 01:18:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-22 01:18:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-22 01:18:58,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-11-22 01:18:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:58,547 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-22 01:18:58,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-22 01:18:58,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-22 01:18:58,555 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-11-22 01:18:58,556 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-11-22 01:18:58,556 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-22 01:18:58,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-22 01:18:58,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-22 01:18:58,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-11-22 01:18:58,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-11-22 01:18:58,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-22 01:18:58,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-22 01:18:58,767 INFO L444 BasicCegarLoop]: Path program histogram: [14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:58,769 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 01:18:58,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:18:58 BoogieIcfgContainer [2022-11-22 01:18:58,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 01:18:58,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 01:18:58,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 01:18:58,773 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 01:18:58,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:14:30" (3/4) ... [2022-11-22 01:18:58,776 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-22 01:18:58,785 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2022-11-22 01:18:58,786 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-22 01:18:58,786 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-22 01:18:58,786 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-22 01:18:58,825 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/witness.graphml [2022-11-22 01:18:58,826 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 01:18:58,826 INFO L158 Benchmark]: Toolchain (without parser) took 269303.37ms. Allocated memory was 121.6MB in the beginning and 343.9MB in the end (delta: 222.3MB). Free memory was 77.5MB in the beginning and 223.5MB in the end (delta: -146.0MB). Peak memory consumption was 78.8MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,826 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 121.6MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:18:58,827 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.32ms. Allocated memory is still 121.6MB. Free memory was 77.1MB in the beginning and 61.2MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,827 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.28ms. Allocated memory is still 121.6MB. Free memory was 61.2MB in the beginning and 59.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,827 INFO L158 Benchmark]: Boogie Preprocessor took 67.94ms. Allocated memory is still 121.6MB. Free memory was 59.1MB in the beginning and 57.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,827 INFO L158 Benchmark]: RCFGBuilder took 633.33ms. Allocated memory is still 121.6MB. Free memory was 57.7MB in the beginning and 92.5MB in the end (delta: -34.8MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,828 INFO L158 Benchmark]: TraceAbstraction took 268070.11ms. Allocated memory was 121.6MB in the beginning and 343.9MB in the end (delta: 222.3MB). Free memory was 91.9MB in the beginning and 226.2MB in the end (delta: -134.3MB). Peak memory consumption was 87.4MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,828 INFO L158 Benchmark]: Witness Printer took 52.87ms. Allocated memory is still 343.9MB. Free memory was 226.2MB in the beginning and 223.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-22 01:18:58,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 121.6MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.32ms. Allocated memory is still 121.6MB. Free memory was 77.1MB in the beginning and 61.2MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.28ms. Allocated memory is still 121.6MB. Free memory was 61.2MB in the beginning and 59.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.94ms. Allocated memory is still 121.6MB. Free memory was 59.1MB in the beginning and 57.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 633.33ms. Allocated memory is still 121.6MB. Free memory was 57.7MB in the beginning and 92.5MB in the end (delta: -34.8MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. * TraceAbstraction took 268070.11ms. Allocated memory was 121.6MB in the beginning and 343.9MB in the end (delta: 222.3MB). Free memory was 91.9MB in the beginning and 226.2MB in the end (delta: -134.3MB). Peak memory consumption was 87.4MB. Max. memory is 16.1GB. * Witness Printer took 52.87ms. Allocated memory is still 343.9MB. Free memory was 226.2MB in the beginning and 223.5MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 268.0s, OverallIterations: 34, TraceHistogramMax: 9, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 82.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 6235 SdHoareTripleChecker+Valid, 20.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6235 mSDsluCounter, 5867 SdHoareTripleChecker+Invalid, 18.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 68 IncrementalHoareTripleChecker+Unchecked, 5360 mSDsCounter, 439 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15543 IncrementalHoareTripleChecker+Invalid, 16056 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 439 mSolverCounterUnsat, 507 mSDtfsCounter, 15543 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3252 GetRequests, 1618 SyntacticMatches, 44 SemanticMatches, 1590 ConstructedPredicates, 2 IntricatePredicates, 20 DeprecatedPredicates, 27883 ImplicationChecksByTransitivity, 183.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=278occurred in iteration=23, InterpolantAutomatonStates: 666, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 508 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 49.6s InterpolantComputationTime, 1697 NumberOfCodeBlocks, 1667 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 2427 ConstructedInterpolants, 262 QuantifiedInterpolants, 29616 SizeOfPredicates, 475 NumberOfNonLiveVariables, 5777 ConjunctsInSsa, 1319 ConjunctsInUnsatCore, 84 InterpolantComputations, 9 PerfectInterpolantSequences, 1472/4179 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 21, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 43, TOOLS_POST_TIME: 2.2s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 43, TOOLS_QUANTIFIERELIM_TIME: 2.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 92, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 6, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 10, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 21, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 4, LOOP_SUMMARIZER_CACHE_MISSES: 4, LOOP_SUMMARIZER_OVERALL_TIME: 0.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 10, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 297, DAG_COMPRESSION_RETAINED_NODES: 70, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-22 01:18:58,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500c1de5-d4af-49c4-b97c-616313225046/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE