./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:42:25,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:42:25,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:42:25,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:42:25,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:42:25,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:42:25,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:42:25,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:42:25,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:42:25,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:42:25,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:42:25,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:42:25,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:42:25,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:42:25,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:42:25,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:42:25,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:42:25,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:42:25,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:42:25,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:42:25,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:42:25,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:42:25,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:42:25,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:42:25,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:42:25,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:42:25,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:42:25,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:42:25,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:42:25,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:42:25,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:42:25,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:42:25,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:42:25,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:42:25,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:42:25,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:42:25,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:42:25,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:42:25,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:42:25,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:42:25,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:42:25,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:42:25,728 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:42:25,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:42:25,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:42:25,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:42:25,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:42:25,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:42:25,731 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:42:25,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:42:25,731 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:42:25,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:42:25,733 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:42:25,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:42:25,733 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:42:25,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:42:25,734 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:42:25,734 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:42:25,734 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:42:25,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:42:25,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:42:25,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:42:25,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:42:25,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:42:25,738 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:42:25,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:42:25,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:42:25,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:42:25,739 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:42:25,739 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:42:25,740 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:42:25,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:42:25,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:42:25,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:42:25,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:42:25,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:42:25,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:42:25,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:42:25,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:42:25,742 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:42:25,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:42:25,743 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:42:25,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:42:25,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:42:25,744 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_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2022-11-19 06:42:26,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:42:26,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:42:26,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:42:26,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:42:26,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:42:26,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-19 06:42:26,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/data/91ed6b05e/69ec06b5ce7043388b24cb718403f330/FLAG1e9d85fed [2022-11-19 06:42:26,586 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:42:26,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-19 06:42:26,597 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/data/91ed6b05e/69ec06b5ce7043388b24cb718403f330/FLAG1e9d85fed [2022-11-19 06:42:26,914 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/data/91ed6b05e/69ec06b5ce7043388b24cb718403f330 [2022-11-19 06:42:26,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:42:26,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:42:26,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:42:26,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:42:26,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:42:26,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:26" (1/1) ... [2022-11-19 06:42:26,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188cdb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:26, skipping insertion in model container [2022-11-19 06:42:26,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:26" (1/1) ... [2022-11-19 06:42:26,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:42:26,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:42:27,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:42:27,403 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:42:27,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:42:27,490 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:42:27,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27 WrapperNode [2022-11-19 06:42:27,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:42:27,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:42:27,492 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:42:27,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:42:27,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,550 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-19 06:42:27,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:42:27,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:42:27,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:42:27,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:42:27,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:42:27,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:42:27,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:42:27,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:42:27,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (1/1) ... [2022-11-19 06:42:27,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:42:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:27,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:42:27,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:42:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:42:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:42:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:42:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:42:27,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:42:27,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:42:27,792 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:42:27,794 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:42:27,932 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:42:27,980 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:42:27,980 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:42:27,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:27 BoogieIcfgContainer [2022-11-19 06:42:27,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:42:27,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:42:27,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:42:27,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:42:27,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:42:26" (1/3) ... [2022-11-19 06:42:27,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208b88d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:27, skipping insertion in model container [2022-11-19 06:42:27,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:27" (2/3) ... [2022-11-19 06:42:27,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208b88d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:27, skipping insertion in model container [2022-11-19 06:42:27,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:27" (3/3) ... [2022-11-19 06:42:27,992 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2022-11-19 06:42:28,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:42:28,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-19 06:42:28,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:42:28,126 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;@211a265e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:42:28,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-19 06:42:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:42:28,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:28,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:42:28,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash 88958, now seen corresponding path program 1 times [2022-11-19 06:42:28,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:28,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135161698] [2022-11-19 06:42:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:28,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135161698] [2022-11-19 06:42:28,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135161698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:28,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:28,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:42:28,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958899694] [2022-11-19 06:42:28,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:28,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:28,453 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:28,521 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-19 06:42:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:28,524 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 [2022-11-19 06:42:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:28,531 INFO L225 Difference]: With dead ends: 14 [2022-11-19 06:42:28,531 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:42:28,539 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 [2022-11-19 06:42:28,543 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:28,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:42:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 06:42:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-19 06:42:28,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2022-11-19 06:42:28,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:28,577 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-19 06:42:28,578 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) [2022-11-19 06:42:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-19 06:42:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:42:28,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:28,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:42:28,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:42:28,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash 88959, now seen corresponding path program 1 times [2022-11-19 06:42:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:28,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917376715] [2022-11-19 06:42:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:28,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:28,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917376715] [2022-11-19 06:42:28,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917376715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:28,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:28,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:42:28,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317083412] [2022-11-19 06:42:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:28,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:42:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:28,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:42:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:28,862 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:28,945 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-19 06:42:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:42:28,946 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 [2022-11-19 06:42:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:28,946 INFO L225 Difference]: With dead ends: 24 [2022-11-19 06:42:28,946 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 06:42:28,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:42:28,949 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:28,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 06:42:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-11-19 06:42:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-19 06:42:28,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2022-11-19 06:42:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:28,954 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-19 06:42:28,954 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) [2022-11-19 06:42:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-19 06:42:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 06:42:28,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:28,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 06:42:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:42:28,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash 90363, now seen corresponding path program 1 times [2022-11-19 06:42:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105289496] [2022-11-19 06:42:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:29,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105289496] [2022-11-19 06:42:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105289496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:29,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:42:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035811253] [2022-11-19 06:42:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:42:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:42:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:29,218 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:29,238 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-19 06:42:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:29,239 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 [2022-11-19 06:42:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:29,240 INFO L225 Difference]: With dead ends: 14 [2022-11-19 06:42:29,240 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 06:42:29,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:29,241 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:29,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 06:42:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 06:42:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-19 06:42:29,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2022-11-19 06:42:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:29,246 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-19 06:42:29,246 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) [2022-11-19 06:42:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-19 06:42:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:42:29,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:29,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:42:29,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:42:29,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2802126, now seen corresponding path program 1 times [2022-11-19 06:42:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:29,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734816306] [2022-11-19 06:42:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:29,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:29,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734816306] [2022-11-19 06:42:29,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734816306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:29,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:29,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:42:29,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190570671] [2022-11-19 06:42:29,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:29,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:29,293 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:29,311 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-19 06:42:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 06:42:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:29,312 INFO L225 Difference]: With dead ends: 13 [2022-11-19 06:42:29,312 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:42:29,313 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 [2022-11-19 06:42:29,314 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:29,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:42:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 06:42:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-19 06:42:29,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2022-11-19 06:42:29,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:29,318 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-19 06:42:29,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-19 06:42:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:42:29,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:29,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:42:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:42:29,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2802127, now seen corresponding path program 1 times [2022-11-19 06:42:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:29,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643175589] [2022-11-19 06:42:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:29,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643175589] [2022-11-19 06:42:29,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643175589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:29,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:29,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:42:29,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421533967] [2022-11-19 06:42:29,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:42:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:42:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:29,437 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:29,483 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-19 06:42:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:42:29,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 06:42:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:29,484 INFO L225 Difference]: With dead ends: 18 [2022-11-19 06:42:29,485 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:42:29,486 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 [2022-11-19 06:42:29,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:29,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:42:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-19 06:42:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-19 06:42:29,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2022-11-19 06:42:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:29,498 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-19 06:42:29,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-19 06:42:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:42:29,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:29,503 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-19 06:42:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:42:29,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 85522820, now seen corresponding path program 1 times [2022-11-19 06:42:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:29,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948629307] [2022-11-19 06:42:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:29,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:29,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948629307] [2022-11-19 06:42:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948629307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:29,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627474081] [2022-11-19 06:42:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:29,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:29,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:42:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:42:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:29,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:30,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:30,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627474081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:30,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586247833] [2022-11-19 06:42:30,173 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-19 06:42:30,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:30,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:30,182 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:30,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:30,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:30,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:30,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:30,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:30,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:30,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet7#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~nondet7#1| 127) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:30,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:30,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:30,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-19 06:42:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130004445] [2022-11-19 06:42:30,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:30,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:42:30,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:42:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:42:30,674 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:30,900 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-19 06:42:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:42:30,901 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 [2022-11-19 06:42:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:30,902 INFO L225 Difference]: With dead ends: 30 [2022-11-19 06:42:30,902 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 06:42:30,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:42:30,903 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:30,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 06:42:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 11. [2022-11-19 06:42:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-19 06:42:30,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2022-11-19 06:42:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:30,906 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-19 06:42:30,906 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) [2022-11-19 06:42:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-19 06:42:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:42:30,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:30,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:42:30,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:31,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:42:31,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1602123832, now seen corresponding path program 1 times [2022-11-19 06:42:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:31,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553406053] [2022-11-19 06:42:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553406053] [2022-11-19 06:42:31,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553406053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:31,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:31,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:42:31,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974838250] [2022-11-19 06:42:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:42:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:42:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:42:31,241 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:31,342 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-19 06:42:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:42:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:42:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:31,344 INFO L225 Difference]: With dead ends: 19 [2022-11-19 06:42:31,344 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 06:42:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:42:31,345 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:31,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 06:42:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-19 06:42:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-19 06:42:31,354 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2022-11-19 06:42:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:31,354 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-19 06:42:31,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-19 06:42:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:42:31,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:31,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:42:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:42:31,359 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1873767508, now seen corresponding path program 1 times [2022-11-19 06:42:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:31,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408089854] [2022-11-19 06:42:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408089854] [2022-11-19 06:42:31,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408089854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:31,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:31,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:42:31,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835638815] [2022-11-19 06:42:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:42:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:42:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:31,473 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:31,488 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-19 06:42:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:42:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:42:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:31,489 INFO L225 Difference]: With dead ends: 14 [2022-11-19 06:42:31,489 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 06:42:31,490 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 [2022-11-19 06:42:31,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:31,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 06:42:31,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 06:42:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-19 06:42:31,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-19 06:42:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:31,495 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-19 06:42:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-19 06:42:31,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:42:31,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:31,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:42:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:42:31,497 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 937389987, now seen corresponding path program 1 times [2022-11-19 06:42:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343901402] [2022-11-19 06:42:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343901402] [2022-11-19 06:42:31,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343901402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128217701] [2022-11-19 06:42:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:31,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:31,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:31,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:42:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:42:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:31,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:42:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128217701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030370337] [2022-11-19 06:42:31,996 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:31,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:31,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:31,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:31,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:32,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:32,044 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 [2022-11-19 06:42:32,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:32,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:32,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:32,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:32,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:32,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:32,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:32,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-19 06:42:32,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575143086] [2022-11-19 06:42:32,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:42:32,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:32,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:42:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:42:32,654 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:32,769 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-19 06:42:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:42:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:42:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:32,771 INFO L225 Difference]: With dead ends: 13 [2022-11-19 06:42:32,771 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 06:42:32,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:42:32,772 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:32,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:42:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 06:42:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-11-19 06:42:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-19 06:42:32,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-19 06:42:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:32,774 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-19 06:42:32,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-19 06:42:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:42:32,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:32,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:42:32,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:32,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 06:42:32,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1111355236, now seen corresponding path program 2 times [2022-11-19 06:42:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:32,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432680529] [2022-11-19 06:42:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:33,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432680529] [2022-11-19 06:42:33,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432680529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:33,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255139675] [2022-11-19 06:42:33,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:42:33,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:33,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:33,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:33,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:42:33,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:42:33,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 06:42:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:33,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:33,618 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 [2022-11-19 06:42:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:33,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:33,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-19 06:42:33,664 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 [2022-11-19 06:42:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:33,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255139675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969958300] [2022-11-19 06:42:33,761 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:33,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:33,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:33,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:33,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:33,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:33,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:42:33,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:33,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:33,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:34,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '519#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:34,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:34,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-11-19 06:42:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874052460] [2022-11-19 06:42:34,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:34,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:42:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:42:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:42:34,690 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:35,040 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-19 06:42:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:42:35,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:42:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:35,042 INFO L225 Difference]: With dead ends: 19 [2022-11-19 06:42:35,042 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 06:42:35,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:42:35,043 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:35,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 10 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 06:42:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-19 06:42:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-19 06:42:35,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2022-11-19 06:42:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:35,046 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-19 06:42:35,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-19 06:42:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:42:35,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:35,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 06:42:35,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:42:35,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash 568496887, now seen corresponding path program 3 times [2022-11-19 06:42:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287673393] [2022-11-19 06:42:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:35,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287673393] [2022-11-19 06:42:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287673393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253522303] [2022-11-19 06:42:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:42:35,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:35,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:35,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:35,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:42:35,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:42:35,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 06:42:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:35,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:42:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253522303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:35,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230556944] [2022-11-19 06:42:35,849 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:35,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:35,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:35,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:35,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:35,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:35,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:35,964 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 [2022-11-19 06:42:35,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:36,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:36,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:36,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:36,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:36,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:36,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-19 06:42:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065920843] [2022-11-19 06:42:36,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:42:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:42:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:42:36,504 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:36,669 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-19 06:42:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:42:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:42:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:36,670 INFO L225 Difference]: With dead ends: 16 [2022-11-19 06:42:36,670 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 06:42:36,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-11-19 06:42:36,672 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 50 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:36,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 06:42:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-19 06:42:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-19 06:42:36,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-11-19 06:42:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:36,674 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-19 06:42:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-19 06:42:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:42:36,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:36,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 06:42:36,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:36,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:42:36,881 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 864661232, now seen corresponding path program 4 times [2022-11-19 06:42:36,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:36,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759304951] [2022-11-19 06:42:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:37,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759304951] [2022-11-19 06:42:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759304951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729305532] [2022-11-19 06:42:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:42:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:37,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:37,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:42:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 06:42:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:37,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:37,509 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 [2022-11-19 06:42:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:37,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:37,578 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 [2022-11-19 06:42:37,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 06:42:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:37,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729305532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:37,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1119704389] [2022-11-19 06:42:37,835 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:37,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:37,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:37,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:37,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:37,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:37,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:42:37,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:38,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:38,075 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:38,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '808#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:38,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:38,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:38,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-11-19 06:42:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381461059] [2022-11-19 06:42:38,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:42:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:42:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:42:38,617 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:38,901 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-19 06:42:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:42:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 06:42:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:38,907 INFO L225 Difference]: With dead ends: 25 [2022-11-19 06:42:38,907 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 06:42:38,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 06:42:38,908 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:38,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 06:42:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-19 06:42:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-19 06:42:38,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-11-19 06:42:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:38,911 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-19 06:42:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-19 06:42:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:42:38,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:38,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2022-11-19 06:42:38,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:42:39,126 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1264874549, now seen corresponding path program 5 times [2022-11-19 06:42:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:39,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435408586] [2022-11-19 06:42:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:39,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435408586] [2022-11-19 06:42:39,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435408586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745125646] [2022-11-19 06:42:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:42:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:39,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:42:39,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:42:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 06:42:39,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:39,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:39,925 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 [2022-11-19 06:42:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:39,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745125646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074187100] [2022-11-19 06:42:39,988 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:39,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:39,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:39,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:39,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:40,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:42:40,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:40,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:40,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:40,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '984#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:40,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:40,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:40,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-11-19 06:42:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826259036] [2022-11-19 06:42:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:40,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 06:42:40,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 06:42:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:42:40,656 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:40,935 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-19 06:42:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:42:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 06:42:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:40,936 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:42:40,937 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 06:42:40,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:42:40,938 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 06:42:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-19 06:42:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 06:42:40,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-11-19 06:42:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:40,941 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 06:42:40,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 06:42:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:42:40,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:40,942 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 06:42:40,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:41,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash -68697404, now seen corresponding path program 6 times [2022-11-19 06:42:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313815890] [2022-11-19 06:42:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:41,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:41,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313815890] [2022-11-19 06:42:41,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313815890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143947879] [2022-11-19 06:42:41,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:42:41,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:41,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:41,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:41,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:42:41,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:42:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 06:42:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:41,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:41,839 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 [2022-11-19 06:42:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:41,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:41,891 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 [2022-11-19 06:42:41,898 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 [2022-11-19 06:42:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143947879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486178168] [2022-11-19 06:42:42,016 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:42,016 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:42,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:42,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:42,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:42,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:42,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:42:42,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:42,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:42,161 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:42,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1166#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:42,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:42,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-19 06:42:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895323062] [2022-11-19 06:42:42,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:42,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 06:42:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 06:42:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:42:42,675 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:43,049 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-19 06:42:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 06:42:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 06:42:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:43,054 INFO L225 Difference]: With dead ends: 31 [2022-11-19 06:42:43,054 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 06:42:43,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:42:43,055 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:43,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 10 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 06:42:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-19 06:42:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-19 06:42:43,058 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-11-19 06:42:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:43,058 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-19 06:42:43,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-19 06:42:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:42:43,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:43,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2022-11-19 06:42:43,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 06:42:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:42:43,260 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1262896609, now seen corresponding path program 7 times [2022-11-19 06:42:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555663493] [2022-11-19 06:42:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:43,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555663493] [2022-11-19 06:42:43,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555663493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432932390] [2022-11-19 06:42:43,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:42:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:43,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:43,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:42:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-19 06:42:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:43,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:42:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:44,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432932390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:44,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365265625] [2022-11-19 06:42:44,135 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:44,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:44,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:44,135 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:44,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:44,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:44,174 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 11 treesize of output 7 [2022-11-19 06:42:44,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:44,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:44,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:44,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1386#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:44,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:44,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:44,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-11-19 06:42:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557199141] [2022-11-19 06:42:44,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:44,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 06:42:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 06:42:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:42:44,856 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:45,151 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-19 06:42:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:42:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 06:42:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:45,152 INFO L225 Difference]: With dead ends: 24 [2022-11-19 06:42:45,152 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 06:42:45,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:42:45,154 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:45,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 06:42:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-19 06:42:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-19 06:42:45,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-11-19 06:42:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:45,156 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-19 06:42:45,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-19 06:42:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:42:45,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:45,157 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2022-11-19 06:42:45,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:45,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:42:45,364 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1832102936, now seen corresponding path program 8 times [2022-11-19 06:42:45,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119431850] [2022-11-19 06:42:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:45,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:45,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119431850] [2022-11-19 06:42:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119431850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688663191] [2022-11-19 06:42:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:42:45,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:45,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:45,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:42:45,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 06:42:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 06:42:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:46,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:46,177 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 [2022-11-19 06:42:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:46,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:46,222 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 [2022-11-19 06:42:46,225 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 [2022-11-19 06:42:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688663191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60554024] [2022-11-19 06:42:46,352 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:46,352 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:46,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:46,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:46,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:46,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:46,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:42:46,431 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 14 treesize of output 10 [2022-11-19 06:42:46,461 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 [2022-11-19 06:42:46,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:47,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1605#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:47,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:47,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:47,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-11-19 06:42:47,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367575569] [2022-11-19 06:42:47,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:47,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:42:47,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:47,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:42:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:42:47,257 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:47,721 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-11-19 06:42:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:42:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 06:42:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:47,722 INFO L225 Difference]: With dead ends: 37 [2022-11-19 06:42:47,722 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 06:42:47,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:42:47,723 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:47,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 06:42:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-19 06:42:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-19 06:42:47,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-11-19 06:42:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:47,728 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-19 06:42:47,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-19 06:42:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 06:42:47,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:47,729 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2022-11-19 06:42:47,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:42:47,930 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:47,930 INFO L85 PathProgramCache]: Analyzing trace with hash -214663693, now seen corresponding path program 9 times [2022-11-19 06:42:47,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:47,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214561175] [2022-11-19 06:42:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:47,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:48,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214561175] [2022-11-19 06:42:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214561175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754779117] [2022-11-19 06:42:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:42:48,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:48,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:48,378 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:48,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:42:48,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:42:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-19 06:42:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:48,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:42:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:48,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:49,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754779117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467133107] [2022-11-19 06:42:49,118 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:49,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:49,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:49,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:49,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:49,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:49,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:49,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:49,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:49,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:49,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:49,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:49,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:49,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:49,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-19 06:42:49,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389040457] [2022-11-19 06:42:49,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:49,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:42:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:42:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:42:49,771 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:50,181 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-19 06:42:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:42:50,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 06:42:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:50,183 INFO L225 Difference]: With dead ends: 28 [2022-11-19 06:42:50,183 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 06:42:50,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1948, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 06:42:50,184 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:50,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 06:42:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-19 06:42:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-19 06:42:50,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-11-19 06:42:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:50,187 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-19 06:42:50,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-19 06:42:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 06:42:50,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:50,188 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2022-11-19 06:42:50,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:50,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:42:50,388 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -133379348, now seen corresponding path program 10 times [2022-11-19 06:42:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:50,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29886539] [2022-11-19 06:42:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:50,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:50,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29886539] [2022-11-19 06:42:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29886539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586405247] [2022-11-19 06:42:50,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:42:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:50,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:50,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:50,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:42:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-19 06:42:50,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:51,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:51,254 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 [2022-11-19 06:42:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:51,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:51,314 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 [2022-11-19 06:42:51,316 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 [2022-11-19 06:42:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:51,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586405247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978128237] [2022-11-19 06:42:51,453 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:51,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:51,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:51,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:51,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:51,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:51,491 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 [2022-11-19 06:42:51,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:51,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:51,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:52,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2124#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:52,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:52,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:52,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-11-19 06:42:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462576734] [2022-11-19 06:42:52,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:52,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 06:42:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:52,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 06:42:52,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 06:42:52,167 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:52,747 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-11-19 06:42:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:42:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 06:42:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:52,748 INFO L225 Difference]: With dead ends: 43 [2022-11-19 06:42:52,748 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 06:42:52,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 06:42:52,750 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:52,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 431 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-19 06:42:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 06:42:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-19 06:42:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-19 06:42:52,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-11-19 06:42:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:52,753 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-19 06:42:52,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-19 06:42:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 06:42:52,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:52,754 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2022-11-19 06:42:52,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:52,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:42:52,958 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 189478727, now seen corresponding path program 11 times [2022-11-19 06:42:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073332097] [2022-11-19 06:42:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:53,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073332097] [2022-11-19 06:42:53,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073332097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737990470] [2022-11-19 06:42:53,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:42:53,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:53,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:53,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:42:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 06:42:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:53,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 06:42:53,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:53,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:54,213 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 [2022-11-19 06:42:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:54,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737990470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:54,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610460343] [2022-11-19 06:42:54,339 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:54,339 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:54,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:54,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:54,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:54,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:54,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:42:54,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:54,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:54,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:55,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2429#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:55,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:55,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:55,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-11-19 06:42:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713177903] [2022-11-19 06:42:55,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:55,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 06:42:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 06:42:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:42:55,013 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:55,390 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-11-19 06:42:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:42:55,391 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-19 06:42:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:55,391 INFO L225 Difference]: With dead ends: 32 [2022-11-19 06:42:55,391 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 06:42:55,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 06:42:55,393 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 89 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:55,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 06:42:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-19 06:42:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-19 06:42:55,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-11-19 06:42:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:55,395 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-19 06:42:55,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-19 06:42:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:42:55,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:55,396 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2022-11-19 06:42:55,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:55,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:55,605 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429632, now seen corresponding path program 12 times [2022-11-19 06:42:55,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895224725] [2022-11-19 06:42:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:55,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:56,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895224725] [2022-11-19 06:42:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895224725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:56,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639559658] [2022-11-19 06:42:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:42:56,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:56,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:56,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:42:56,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:42:56,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:42:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 06:42:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:56,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:56,621 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 [2022-11-19 06:42:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:56,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:56,685 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 [2022-11-19 06:42:56,686 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 [2022-11-19 06:42:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:56,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639559658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:56,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176608962] [2022-11-19 06:42:56,839 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:42:56,839 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:56,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:56,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:56,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:56,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:42:56,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:56,904 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 [2022-11-19 06:42:56,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:56,965 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:42:57,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:42:57,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2722#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:42:57,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:42:57,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:42:57,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-11-19 06:42:57,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546705519] [2022-11-19 06:42:57,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:42:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 06:42:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 06:42:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:42:57,521 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:58,309 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-19 06:42:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 06:42:58,309 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-19 06:42:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:58,310 INFO L225 Difference]: With dead ends: 49 [2022-11-19 06:42:58,310 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 06:42:58,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:42:58,311 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:58,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 22 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:42:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 06:42:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-19 06:42:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-19 06:42:58,314 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-11-19 06:42:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:58,314 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-19 06:42:58,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:42:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-19 06:42:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 06:42:58,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:58,315 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2022-11-19 06:42:58,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:42:58,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:58,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:42:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1601878501, now seen corresponding path program 13 times [2022-11-19 06:42:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254274732] [2022-11-19 06:42:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:59,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254274732] [2022-11-19 06:42:59,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254274732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009791765] [2022-11-19 06:42:59,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:42:59,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:59,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:59,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:59,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:42:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 06:42:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:59,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:42:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:00,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009791765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:00,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122446156] [2022-11-19 06:43:00,220 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:00,220 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:00,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:00,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:00,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:00,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:00,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:00,281 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 [2022-11-19 06:43:00,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:00,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:00,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:00,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3071#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:00,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:00,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:00,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-11-19 06:43:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930954383] [2022-11-19 06:43:00,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:00,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 06:43:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 06:43:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 06:43:00,948 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:01,551 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-19 06:43:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:43:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 06:43:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:01,552 INFO L225 Difference]: With dead ends: 36 [2022-11-19 06:43:01,552 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 06:43:01,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=630, Invalid=3030, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 06:43:01,554 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:01,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:43:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 06:43:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-19 06:43:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-19 06:43:01,558 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-11-19 06:43:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:01,558 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-19 06:43:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-19 06:43:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 06:43:01,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:01,560 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 06:43:01,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:01,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 06:43:01,766 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1806948076, now seen corresponding path program 14 times [2022-11-19 06:43:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987447747] [2022-11-19 06:43:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:02,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987447747] [2022-11-19 06:43:02,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987447747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374217731] [2022-11-19 06:43:02,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:02,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:02,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:02,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:43:02,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 06:43:02,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 06:43:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:02,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:03,026 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 [2022-11-19 06:43:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:03,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:03,095 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 [2022-11-19 06:43:03,097 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 [2022-11-19 06:43:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:03,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374217731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:03,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293732258] [2022-11-19 06:43:03,265 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:03,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:03,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:03,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:03,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:03,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:03,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:03,329 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 [2022-11-19 06:43:03,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:03,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:03,440 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:03,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3401#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:03,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:03,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:03,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-11-19 06:43:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472403165] [2022-11-19 06:43:03,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 06:43:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 06:43:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 06:43:03,948 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:04,856 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-19 06:43:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 06:43:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-19 06:43:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:04,857 INFO L225 Difference]: With dead ends: 55 [2022-11-19 06:43:04,858 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 06:43:04,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 06:43:04,859 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:04,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 18 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 800 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-19 06:43:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 06:43:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-19 06:43:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-19 06:43:04,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-11-19 06:43:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:04,862 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-19 06:43:04,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:04,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-19 06:43:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 06:43:04,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:04,863 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1] [2022-11-19 06:43:04,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:05,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:05,064 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash 481430127, now seen corresponding path program 15 times [2022-11-19 06:43:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:05,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262110546] [2022-11-19 06:43:05,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:05,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262110546] [2022-11-19 06:43:05,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262110546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494086874] [2022-11-19 06:43:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:43:05,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:05,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:05,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 06:43:05,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:43:05,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-19 06:43:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:05,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494086874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232451489] [2022-11-19 06:43:06,817 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:06,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:06,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:06,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:06,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:06,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:06,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:06,886 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 [2022-11-19 06:43:06,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:06,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:07,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3793#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:07,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:07,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:07,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-11-19 06:43:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930452566] [2022-11-19 06:43:07,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:07,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 06:43:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 06:43:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2701, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:43:07,608 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:08,179 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-19 06:43:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:43:08,179 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-19 06:43:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:08,180 INFO L225 Difference]: With dead ends: 40 [2022-11-19 06:43:08,180 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 06:43:08,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=764, Invalid=3658, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 06:43:08,182 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 174 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:08,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:43:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 06:43:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-19 06:43:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-19 06:43:08,185 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-11-19 06:43:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:08,186 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-19 06:43:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-19 06:43:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:43:08,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:08,187 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2022-11-19 06:43:08,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:08,393 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1202116504, now seen corresponding path program 16 times [2022-11-19 06:43:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309887093] [2022-11-19 06:43:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:08,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:09,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309887093] [2022-11-19 06:43:09,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309887093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933933086] [2022-11-19 06:43:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:43:09,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:09,133 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:09,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 06:43:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:09,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 06:43:09,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:09,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:09,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:10,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:10,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:43:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:10,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:11,398 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 [2022-11-19 06:43:11,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 06:43:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:12,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933933086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217068846] [2022-11-19 06:43:12,034 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:12,034 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:12,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:12,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:12,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:12,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:12,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:43:12,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:12,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:12,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:13,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4187#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:13,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:13,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:13,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 64 [2022-11-19 06:43:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718449861] [2022-11-19 06:43:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:13,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-19 06:43:13,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-19 06:43:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4559, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 06:43:13,134 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:14,563 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-19 06:43:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 06:43:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-19 06:43:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:14,564 INFO L225 Difference]: With dead ends: 64 [2022-11-19 06:43:14,564 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 06:43:14,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=673, Invalid=6809, Unknown=0, NotChecked=0, Total=7482 [2022-11-19 06:43:14,566 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:14,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 5 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 564 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-19 06:43:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 06:43:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-11-19 06:43:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-19 06:43:14,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-11-19 06:43:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:14,570 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-19 06:43:14,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-19 06:43:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 06:43:14,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:14,571 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2022-11-19 06:43:14,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 06:43:14,777 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 390126908, now seen corresponding path program 17 times [2022-11-19 06:43:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65337279] [2022-11-19 06:43:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:14,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:15,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65337279] [2022-11-19 06:43:15,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65337279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:15,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920376591] [2022-11-19 06:43:15,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:15,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:15,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:15,597 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:15,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:43:15,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 06:43:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 06:43:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:16,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:16,268 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 [2022-11-19 06:43:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:16,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:16,342 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 [2022-11-19 06:43:16,345 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 [2022-11-19 06:43:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:16,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920376591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:16,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467522390] [2022-11-19 06:43:16,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:16,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:16,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:16,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:16,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:16,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:16,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:16,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:16,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:16,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:16,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:17,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4626#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:17,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:17,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:17,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-11-19 06:43:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929205119] [2022-11-19 06:43:17,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 06:43:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 06:43:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 06:43:17,299 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:18,582 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-11-19 06:43:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 06:43:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-19 06:43:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:18,583 INFO L225 Difference]: With dead ends: 67 [2022-11-19 06:43:18,583 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 06:43:18,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=301, Invalid=4255, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 06:43:18,585 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:18,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 22 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1129 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-19 06:43:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 06:43:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-19 06:43:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-19 06:43:18,588 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-11-19 06:43:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:18,588 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-19 06:43:18,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-19 06:43:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 06:43:18,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:18,589 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2022-11-19 06:43:18,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:18,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 06:43:18,795 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1149842327, now seen corresponding path program 18 times [2022-11-19 06:43:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987592336] [2022-11-19 06:43:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:19,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987592336] [2022-11-19 06:43:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987592336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416781698] [2022-11-19 06:43:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:43:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:19,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:19,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 06:43:19,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:43:19,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 06:43:19,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:19,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:21,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416781698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605125442] [2022-11-19 06:43:21,043 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:21,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:21,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:21,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:21,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:21,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:21,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:43:21,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:21,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:21,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:22,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5104#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:22,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:22,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:22,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-11-19 06:43:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420162655] [2022-11-19 06:43:22,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-19 06:43:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-19 06:43:22,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3762, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 06:43:22,103 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:22,932 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-19 06:43:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 06:43:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-19 06:43:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:22,934 INFO L225 Difference]: With dead ends: 48 [2022-11-19 06:43:22,934 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 06:43:22,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1074, Invalid=5088, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 06:43:22,935 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 201 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:22,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 2 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:43:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 06:43:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-19 06:43:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-19 06:43:22,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-11-19 06:43:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:22,938 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-19 06:43:22,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-19 06:43:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:43:22,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:22,939 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2022-11-19 06:43:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:23,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 06:43:23,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:23,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1191880592, now seen corresponding path program 19 times [2022-11-19 06:43:23,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904127960] [2022-11-19 06:43:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:24,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904127960] [2022-11-19 06:43:24,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904127960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815528615] [2022-11-19 06:43:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:43:24,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:24,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:24,061 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:24,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 06:43:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-19 06:43:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:24,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:24,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:25,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:25,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:43:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:25,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:26,987 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 [2022-11-19 06:43:26,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-19 06:43:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:27,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815528615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360094988] [2022-11-19 06:43:27,853 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:27,853 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:27,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:27,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:27,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:27,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:27,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:27,946 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 [2022-11-19 06:43:27,961 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 [2022-11-19 06:43:28,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:28,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5578#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:28,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:28,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 76 [2022-11-19 06:43:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321949880] [2022-11-19 06:43:28,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-19 06:43:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-19 06:43:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=6253, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 06:43:28,906 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:31,056 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-19 06:43:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 06:43:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-19 06:43:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:31,057 INFO L225 Difference]: With dead ends: 76 [2022-11-19 06:43:31,057 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 06:43:31,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=874, Invalid=9226, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 06:43:31,058 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:31,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 860 Invalid, 0 Unknown, 138 Unchecked, 0.5s Time] [2022-11-19 06:43:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 06:43:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-19 06:43:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-19 06:43:31,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-19 06:43:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:31,062 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-19 06:43:31,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-19 06:43:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:43:31,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:31,063 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2022-11-19 06:43:31,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 06:43:31,270 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash -335157404, now seen corresponding path program 20 times [2022-11-19 06:43:31,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011494383] [2022-11-19 06:43:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:32,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011494383] [2022-11-19 06:43:32,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011494383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233576079] [2022-11-19 06:43:32,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:32,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:32,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:32,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 06:43:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-19 06:43:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-19 06:43:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:32,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:33,114 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 [2022-11-19 06:43:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:33,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:33,206 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 [2022-11-19 06:43:33,208 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 [2022-11-19 06:43:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233576079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417422598] [2022-11-19 06:43:33,422 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:33,423 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:33,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:33,423 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:33,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:33,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:33,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:43:33,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:33,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:33,591 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:34,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6097#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:34,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:34,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:34,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2022-11-19 06:43:34,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762480125] [2022-11-19 06:43:34,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:34,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 06:43:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 06:43:34,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 06:43:34,542 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:36,165 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-19 06:43:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 06:43:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 06:43:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:36,166 INFO L225 Difference]: With dead ends: 79 [2022-11-19 06:43:36,166 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 06:43:36,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=345, Invalid=5661, Unknown=0, NotChecked=0, Total=6006 [2022-11-19 06:43:36,167 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 79 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:36,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1543 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-19 06:43:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 06:43:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-19 06:43:36,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-19 06:43:36,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-11-19 06:43:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:36,171 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-19 06:43:36,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-19 06:43:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:43:36,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:36,172 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1] [2022-11-19 06:43:36,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:36,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 06:43:36,379 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash 49001151, now seen corresponding path program 21 times [2022-11-19 06:43:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359116848] [2022-11-19 06:43:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:36,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:37,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359116848] [2022-11-19 06:43:37,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359116848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075966548] [2022-11-19 06:43:37,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:43:37,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:37,465 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:37,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 06:43:37,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:43:37,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-19 06:43:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:37,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:38,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:39,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075966548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:39,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958532574] [2022-11-19 06:43:39,687 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:39,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:39,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:39,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:39,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:39,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:39,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:39,761 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 [2022-11-19 06:43:39,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:39,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:39,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:40,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6661#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:40,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:40,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:40,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 68 [2022-11-19 06:43:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543615354] [2022-11-19 06:43:40,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-19 06:43:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-19 06:43:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=4995, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 06:43:40,516 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:41,633 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-19 06:43:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 06:43:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-19 06:43:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:41,634 INFO L225 Difference]: With dead ends: 56 [2022-11-19 06:43:41,635 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 06:43:41,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1440, Invalid=6750, Unknown=0, NotChecked=0, Total=8190 [2022-11-19 06:43:41,636 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 419 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:41,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 0 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:43:41,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 06:43:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-19 06:43:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-19 06:43:41,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-11-19 06:43:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:41,639 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-19 06:43:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-19 06:43:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 06:43:41,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:41,641 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2022-11-19 06:43:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:41,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 06:43:41,848 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -154534728, now seen corresponding path program 22 times [2022-11-19 06:43:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417319225] [2022-11-19 06:43:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:42,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417319225] [2022-11-19 06:43:42,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417319225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284482218] [2022-11-19 06:43:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:43:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:42,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:42,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 06:43:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:43,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 06:43:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:43,630 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 14 treesize of output 10 [2022-11-19 06:43:43,774 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 [2022-11-19 06:43:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:43,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:43,861 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 [2022-11-19 06:43:43,863 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 [2022-11-19 06:43:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:44,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284482218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:44,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231394582] [2022-11-19 06:43:44,076 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:44,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:44,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:44,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:44,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:44,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:44,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:44,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:44,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:44,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:44,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:44,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7176#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:44,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:44,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:44,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2022-11-19 06:43:44,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756982380] [2022-11-19 06:43:44,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 06:43:44,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 06:43:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:43:44,893 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:46,743 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-19 06:43:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 06:43:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-19 06:43:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:46,745 INFO L225 Difference]: With dead ends: 85 [2022-11-19 06:43:46,745 INFO L226 Difference]: Without dead ends: 58 [2022-11-19 06:43:46,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=367, Invalid=6439, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 06:43:46,746 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 111 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:46,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1708 Invalid, 0 Unknown, 51 Unchecked, 0.8s Time] [2022-11-19 06:43:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-19 06:43:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-19 06:43:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-19 06:43:46,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-11-19 06:43:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:46,749 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-19 06:43:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-19 06:43:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 06:43:46,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:46,751 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1] [2022-11-19 06:43:46,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:46,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:46,957 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1154785939, now seen corresponding path program 23 times [2022-11-19 06:43:46,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:46,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250948597] [2022-11-19 06:43:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 121 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:48,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250948597] [2022-11-19 06:43:48,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250948597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142066151] [2022-11-19 06:43:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:48,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:48,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:48,168 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:48,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 06:43:48,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-19 06:43:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 06:43:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:50,227 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 [2022-11-19 06:43:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142066151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280210549] [2022-11-19 06:43:50,609 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:50,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:50,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:50,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:50,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:50,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:50,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:43:50,683 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 [2022-11-19 06:43:50,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:50,753 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:51,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7782#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:51,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:51,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:51,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 72 [2022-11-19 06:43:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61462813] [2022-11-19 06:43:51,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 06:43:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 06:43:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=5424, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 06:43:51,502 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:52,582 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-19 06:43:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 06:43:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-19 06:43:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:52,583 INFO L225 Difference]: With dead ends: 60 [2022-11-19 06:43:52,583 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 06:43:52,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 102 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3503 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-11-19 06:43:52,584 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 303 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:52,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 0 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:43:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 06:43:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-11-19 06:43:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-19 06:43:52,587 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-11-19 06:43:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:52,587 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-19 06:43:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-19 06:43:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 06:43:52,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:52,588 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2022-11-19 06:43:52,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-19 06:43:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:52,798 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1647724428, now seen corresponding path program 24 times [2022-11-19 06:43:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:52,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725317953] [2022-11-19 06:43:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:52,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:54,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:54,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725317953] [2022-11-19 06:43:54,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725317953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:54,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424333311] [2022-11-19 06:43:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:43:54,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:54,016 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:54,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 06:43:54,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:43:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-19 06:43:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:54,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:55,075 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 [2022-11-19 06:43:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:55,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:55,168 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 [2022-11-19 06:43:55,170 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 [2022-11-19 06:43:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:55,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424333311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:55,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [154784104] [2022-11-19 06:43:55,404 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:43:55,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:55,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:55,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:55,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:55,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:43:55,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:55,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:55,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:55,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:43:55,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:56,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8334#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:56,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:56,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:56,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2022-11-19 06:43:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288679777] [2022-11-19 06:43:56,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:56,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-19 06:43:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-19 06:43:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 06:43:56,259 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:58,330 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-19 06:43:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-19 06:43:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-19 06:43:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:58,331 INFO L225 Difference]: With dead ends: 91 [2022-11-19 06:43:58,331 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 06:43:58,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=389, Invalid=7267, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 06:43:58,332 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 118 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:58,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 24 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2029 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2022-11-19 06:43:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 06:43:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-19 06:43:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-19 06:43:58,335 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-11-19 06:43:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:58,335 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-19 06:43:58,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-19 06:43:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 06:43:58,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:58,336 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1] [2022-11-19 06:43:58,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:58,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 06:43:58,538 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:43:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:58,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1133213721, now seen corresponding path program 25 times [2022-11-19 06:43:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:58,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305025019] [2022-11-19 06:43:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 144 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:59,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305025019] [2022-11-19 06:43:59,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305025019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967075369] [2022-11-19 06:43:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:43:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:59,699 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:59,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 06:43:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:59,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 06:43:59,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:59,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:00,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:01,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967075369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062121885] [2022-11-19 06:44:01,963 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:01,963 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:01,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:01,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:01,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:01,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:44:01,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:02,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:02,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:02,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:02,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:02,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8984#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:02,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:02,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:02,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 78 [2022-11-19 06:44:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54128071] [2022-11-19 06:44:02,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-19 06:44:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:02,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-19 06:44:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=6400, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 06:44:02,835 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:03,989 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-19 06:44:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 06:44:03,989 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-19 06:44:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:03,990 INFO L225 Difference]: With dead ends: 64 [2022-11-19 06:44:03,990 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 06:44:03,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1862, Invalid=8644, Unknown=0, NotChecked=0, Total=10506 [2022-11-19 06:44:03,992 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 227 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:03,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:44:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 06:44:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-19 06:44:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-11-19 06:44:03,994 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-11-19 06:44:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:03,995 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-11-19 06:44:03,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-11-19 06:44:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 06:44:03,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:03,996 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2022-11-19 06:44:04,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:04,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:04,202 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:44:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1903306720, now seen corresponding path program 26 times [2022-11-19 06:44:04,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:04,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509935699] [2022-11-19 06:44:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:05,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509935699] [2022-11-19 06:44:05,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509935699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107618838] [2022-11-19 06:44:05,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:44:05,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:05,610 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:05,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 06:44:06,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-19 06:44:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-19 06:44:06,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:06,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:06,861 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 [2022-11-19 06:44:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:06,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:06,972 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 [2022-11-19 06:44:06,974 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 [2022-11-19 06:44:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:07,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107618838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:07,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991507916] [2022-11-19 06:44:07,217 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:07,218 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:07,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:07,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:07,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:07,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:44:07,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:07,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:07,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:08,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9573#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:08,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:08,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:08,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2022-11-19 06:44:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151605728] [2022-11-19 06:44:08,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 06:44:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 06:44:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3618, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 06:44:08,156 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:10,561 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-19 06:44:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 06:44:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-19 06:44:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:10,562 INFO L225 Difference]: With dead ends: 97 [2022-11-19 06:44:10,562 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 06:44:10,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 06:44:10,563 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 97 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:10,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 35 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 06:44:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 06:44:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-11-19 06:44:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-19 06:44:10,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-11-19 06:44:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:10,566 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-19 06:44:10,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-19 06:44:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 06:44:10,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:10,567 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1] [2022-11-19 06:44:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:10,774 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:44:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash 127058619, now seen corresponding path program 27 times [2022-11-19 06:44:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:10,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176992752] [2022-11-19 06:44:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 169 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:12,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176992752] [2022-11-19 06:44:12,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176992752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143637475] [2022-11-19 06:44:12,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:44:12,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:12,011 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:12,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 06:44:13,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:44:13,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-19 06:44:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:13,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:13,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:15,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143637475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672136335] [2022-11-19 06:44:15,626 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:15,627 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:15,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:15,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:15,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:15,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:44:15,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:15,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:15,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:15,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:15,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:16,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10264#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:16,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:16,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:16,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 81 [2022-11-19 06:44:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323056263] [2022-11-19 06:44:16,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-19 06:44:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-19 06:44:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=6820, Unknown=0, NotChecked=0, Total=7832 [2022-11-19 06:44:16,515 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:17,754 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-11-19 06:44:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 06:44:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-19 06:44:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:17,755 INFO L225 Difference]: With dead ends: 68 [2022-11-19 06:44:17,755 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 06:44:17,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2081, Invalid=9261, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 06:44:17,757 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 313 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 2 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:44:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 06:44:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-19 06:44:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-11-19 06:44:17,760 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-11-19 06:44:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:17,760 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-11-19 06:44:17,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-11-19 06:44:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 06:44:17,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:17,761 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2022-11-19 06:44:17,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:17,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-19 06:44:17,969 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:44:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1844247988, now seen corresponding path program 28 times [2022-11-19 06:44:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190702768] [2022-11-19 06:44:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:19,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190702768] [2022-11-19 06:44:19,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190702768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890352033] [2022-11-19 06:44:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:44:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:19,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:19,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 06:44:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-19 06:44:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:20,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:20,539 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 [2022-11-19 06:44:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:20,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-19 06:44:20,662 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 [2022-11-19 06:44:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:20,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890352033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:20,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040230587] [2022-11-19 06:44:20,918 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:20,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:20,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:20,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:20,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:44:20,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:20,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:21,026 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 [2022-11-19 06:44:21,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:21,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10890#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:21,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:21,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2022-11-19 06:44:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294845543] [2022-11-19 06:44:21,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-19 06:44:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-19 06:44:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3989, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 06:44:21,812 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:24,443 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-11-19 06:44:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-19 06:44:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-19 06:44:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:24,444 INFO L225 Difference]: With dead ends: 103 [2022-11-19 06:44:24,444 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 06:44:24,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=433, Invalid=9073, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 06:44:24,445 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 167 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:24,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 31 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:44:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 06:44:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-19 06:44:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-19 06:44:24,448 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-11-19 06:44:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:24,448 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-19 06:44:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-19 06:44:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 06:44:24,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:24,450 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1] [2022-11-19 06:44:24,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-19 06:44:24,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 06:44:24,656 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:44:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2050929423, now seen corresponding path program 29 times [2022-11-19 06:44:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:24,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851987188] [2022-11-19 06:44:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:26,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851987188] [2022-11-19 06:44:26,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851987188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775165607] [2022-11-19 06:44:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:44:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:26,158 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:26,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 06:44:26,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-19 06:44:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 06:44:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:27,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:29,028 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 [2022-11-19 06:44:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:29,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775165607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:29,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330970126] [2022-11-19 06:44:29,578 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:44:29,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:29,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:29,578 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:29,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:29,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:44:29,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:29,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:29,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:29,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:44:29,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:30,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11625#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:30,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:30,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:30,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 87 [2022-11-19 06:44:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802930120] [2022-11-19 06:44:30,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:30,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-19 06:44:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-19 06:44:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=7647, Unknown=0, NotChecked=0, Total=8930 [2022-11-19 06:44:30,430 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:31,777 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-19 06:44:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 06:44:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-19 06:44:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:31,778 INFO L225 Difference]: With dead ends: 72 [2022-11-19 06:44:31,778 INFO L226 Difference]: Without dead ends: 72 [2022-11-19 06:44:31,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 126 SyntacticMatches, 17 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2338, Invalid=10544, Unknown=0, NotChecked=0, Total=12882 [2022-11-19 06:44:31,779 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 416 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 0 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:44:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-19 06:44:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-11-19 06:44:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-19 06:44:31,782 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-11-19 06:44:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:31,782 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-19 06:44:31,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-19 06:44:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:44:31,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:31,783 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2022-11-19 06:44:31,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 06:44:31,983 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:44:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash -446813944, now seen corresponding path program 30 times [2022-11-19 06:44:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5889804] [2022-11-19 06:44:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:33,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:33,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5889804] [2022-11-19 06:44:33,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5889804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626220815] [2022-11-19 06:44:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:44:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:33,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:33,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 06:44:33,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:44:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 06:44:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:34,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:45:02,995 INFO L321 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2022-11-19 06:45:02,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2022-11-19 06:45:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 38 proven. 479 refuted. 28 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:22,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-19 06:45:22,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:45:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 67 [2022-11-19 06:45:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 47 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:45:23,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626220815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:45:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472121657] [2022-11-19 06:45:23,337 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:45:23,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:45:23,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:45:23,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:45:23,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:45:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:45:23,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:45:23,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:45:23,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:45:23,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:45:24,925 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12334#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:45:24,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:45:24,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:45:24,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 43, 43] total 107 [2022-11-19 06:45:24,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48701034] [2022-11-19 06:45:24,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:45:24,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-19 06:45:24,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:45:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-19 06:45:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=12187, Unknown=55, NotChecked=0, Total=12882 [2022-11-19 06:45:24,929 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:06,058 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-11-19 06:46:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-19 06:46:06,059 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-19 06:46:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:06,060 INFO L225 Difference]: With dead ends: 109 [2022-11-19 06:46:06,060 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 06:46:06,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 4798 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=1435, Invalid=22380, Unknown=55, NotChecked=0, Total=23870 [2022-11-19 06:46:06,063 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 189 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:06,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 32 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2757 Invalid, 0 Unknown, 447 Unchecked, 1.4s Time] [2022-11-19 06:46:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 06:46:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-19 06:46:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-19 06:46:06,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-11-19 06:46:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:06,067 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-19 06:46:06,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-19 06:46:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 06:46:06,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:06,068 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1] [2022-11-19 06:46:06,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:06,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 06:46:06,275 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1557117155, now seen corresponding path program 31 times [2022-11-19 06:46:06,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:06,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086485739] [2022-11-19 06:46:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 225 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:07,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086485739] [2022-11-19 06:46:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086485739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786619747] [2022-11-19 06:46:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:46:07,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:07,830 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:07,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 06:46:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:08,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 06:46:08,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:08,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:46:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:08,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:10,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786619747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455860694] [2022-11-19 06:46:10,980 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:46:10,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:10,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:10,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:10,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:10,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:46:11,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:46:11,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:11,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:11,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:12,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13130#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:46:12,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:46:12,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:46:12,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 93 [2022-11-19 06:46:12,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991724750] [2022-11-19 06:46:12,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:46:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-19 06:46:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-19 06:46:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=8830, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 06:46:12,329 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:14,172 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-19 06:46:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 06:46:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-19 06:46:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:14,173 INFO L225 Difference]: With dead ends: 76 [2022-11-19 06:46:14,173 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 06:46:14,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2600, Invalid=11920, Unknown=0, NotChecked=0, Total=14520 [2022-11-19 06:46:14,176 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:14,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 0 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:46:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 06:46:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-19 06:46:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-19 06:46:14,178 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-11-19 06:46:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:14,179 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-19 06:46:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-19 06:46:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 06:46:14,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:14,180 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2022-11-19 06:46:14,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 06:46:14,380 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1740966364, now seen corresponding path program 32 times [2022-11-19 06:46:14,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103945646] [2022-11-19 06:46:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:14,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:16,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103945646] [2022-11-19 06:46:16,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103945646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120680001] [2022-11-19 06:46:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:46:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:16,003 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:16,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 06:46:16,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-19 06:46:16,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:46:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-19 06:46:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:17,777 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 [2022-11-19 06:46:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:17,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:17,893 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 [2022-11-19 06:46:17,895 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 [2022-11-19 06:46:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:18,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120680001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:18,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124852845] [2022-11-19 06:46:18,169 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:46:18,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:18,169 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:18,169 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:18,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:18,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:46:18,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:18,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:18,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:18,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:18,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:19,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13830#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:46:19,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:46:19,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:46:19,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2022-11-19 06:46:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296304113] [2022-11-19 06:46:19,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:46:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-19 06:46:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-19 06:46:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4785, Unknown=0, NotChecked=0, Total=4970 [2022-11-19 06:46:19,121 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:22,443 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2022-11-19 06:46:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-19 06:46:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-19 06:46:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:22,444 INFO L225 Difference]: With dead ends: 115 [2022-11-19 06:46:22,444 INFO L226 Difference]: Without dead ends: 78 [2022-11-19 06:46:22,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=477, Invalid=11079, Unknown=0, NotChecked=0, Total=11556 [2022-11-19 06:46:22,445 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:22,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 38 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 06:46:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-19 06:46:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-19 06:46:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-19 06:46:22,448 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-11-19 06:46:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:22,448 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-19 06:46:22,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-19 06:46:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 06:46:22,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:22,449 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1] [2022-11-19 06:46:22,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:22,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 06:46:22,654 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1444596681, now seen corresponding path program 33 times [2022-11-19 06:46:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350030184] [2022-11-19 06:46:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 256 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:24,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350030184] [2022-11-19 06:46:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350030184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499939369] [2022-11-19 06:46:24,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:46:24,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:24,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:24,115 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:24,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 06:46:24,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:46:24,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:46:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-19 06:46:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:24,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:46:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:25,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:28,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499939369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004885277] [2022-11-19 06:46:28,396 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:46:28,396 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:28,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:28,397 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:28,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:28,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:46:28,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:28,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:28,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:28,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:28,565 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:29,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14650#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:46:29,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:46:29,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:46:29,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 96 [2022-11-19 06:46:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887352054] [2022-11-19 06:46:29,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:46:29,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-19 06:46:29,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-19 06:46:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=9319, Unknown=0, NotChecked=0, Total=10712 [2022-11-19 06:46:29,386 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:31,043 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-19 06:46:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-19 06:46:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 06:46:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:31,044 INFO L225 Difference]: With dead ends: 80 [2022-11-19 06:46:31,044 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 06:46:31,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2861, Invalid=12639, Unknown=0, NotChecked=0, Total=15500 [2022-11-19 06:46:31,045 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 533 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:31,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:46:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 06:46:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-19 06:46:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-19 06:46:31,046 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-11-19 06:46:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:31,047 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-19 06:46:31,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-19 06:46:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 06:46:31,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:31,048 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2022-11-19 06:46:31,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-19 06:46:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-19 06:46:31,250 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:31,250 INFO L85 PathProgramCache]: Analyzing trace with hash -982974416, now seen corresponding path program 34 times [2022-11-19 06:46:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:31,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241027971] [2022-11-19 06:46:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:32,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:32,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241027971] [2022-11-19 06:46:32,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241027971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:32,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354238785] [2022-11-19 06:46:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:46:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:32,908 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:32,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 06:46:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-19 06:46:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:34,107 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 [2022-11-19 06:46:34,305 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 [2022-11-19 06:46:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:34,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:34,431 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 [2022-11-19 06:46:34,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:46:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:34,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354238785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:34,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641097222] [2022-11-19 06:46:34,745 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:46:34,746 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:34,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:34,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:34,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:34,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:46:34,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:34,823 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 [2022-11-19 06:46:34,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:34,860 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 [2022-11-19 06:46:34,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:35,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15387#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:46:35,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:46:35,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:46:35,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2022-11-19 06:46:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909821058] [2022-11-19 06:46:35,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:46:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-19 06:46:35,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:35,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-19 06:46:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 06:46:35,726 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:39,498 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-19 06:46:39,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-19 06:46:39,498 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-19 06:46:39,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:39,499 INFO L225 Difference]: With dead ends: 121 [2022-11-19 06:46:39,499 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 06:46:39,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=499, Invalid=12157, Unknown=0, NotChecked=0, Total=12656 [2022-11-19 06:46:39,500 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:39,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 46 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 06:46:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 06:46:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-11-19 06:46:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-11-19 06:46:39,502 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-11-19 06:46:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:39,502 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-11-19 06:46:39,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-11-19 06:46:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 06:46:39,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:39,503 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1] [2022-11-19 06:46:39,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:39,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:39,710 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1281787147, now seen corresponding path program 35 times [2022-11-19 06:46:39,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:39,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120267802] [2022-11-19 06:46:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:39,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 289 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:41,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120267802] [2022-11-19 06:46:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120267802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268669837] [2022-11-19 06:46:41,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:46:41,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:41,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:41,364 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:41,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 06:46:42,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-19 06:46:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:46:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-19 06:46:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:42,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:46:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:43,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:46:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:46,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268669837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:46:46,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179460824] [2022-11-19 06:46:46,606 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:46:46,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:46:46,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:46:46,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:46:46,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:46:46,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:46:46,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:46,660 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 [2022-11-19 06:46:46,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:46,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:46:46,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:46:47,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16271#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:46:47,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:46:47,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:46:47,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 122 [2022-11-19 06:46:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240544622] [2022-11-19 06:46:47,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:46:47,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-19 06:46:47,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:46:47,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-19 06:46:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2341, Invalid=14429, Unknown=0, NotChecked=0, Total=16770 [2022-11-19 06:46:47,630 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:46:49,074 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-11-19 06:46:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 06:46:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-19 06:46:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:46:49,075 INFO L225 Difference]: With dead ends: 84 [2022-11-19 06:46:49,076 INFO L226 Difference]: Without dead ends: 84 [2022-11-19 06:46:49,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7765 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4202, Invalid=18750, Unknown=0, NotChecked=0, Total=22952 [2022-11-19 06:46:49,078 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 508 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:46:49,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 2 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:46:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-19 06:46:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-19 06:46:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-11-19 06:46:49,081 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-11-19 06:46:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:46:49,081 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-11-19 06:46:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:46:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-11-19 06:46:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:46:49,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:46:49,082 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2022-11-19 06:46:49,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 06:46:49,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-19 06:46:49,286 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:46:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:46:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash -858166268, now seen corresponding path program 36 times [2022-11-19 06:46:49,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:46:49,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54938623] [2022-11-19 06:46:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:46:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:46:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:46:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:46:51,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:46:51,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54938623] [2022-11-19 06:46:51,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54938623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:46:51,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426339529] [2022-11-19 06:46:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:46:51,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:46:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:46:51,494 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:46:51,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 06:46:52,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:46:52,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:46:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 173 conjunts are in the unsatisfiable core [2022-11-19 06:46:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:46:53,504 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 14 treesize of output 10 [2022-11-19 06:47:13,562 INFO L321 Elim1Store]: treesize reduction 101, result has 10.6 percent of original size [2022-11-19 06:47:13,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 148 treesize of output 70 [2022-11-19 06:47:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 21 proven. 724 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:47:13,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:47:27,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-11-19 06:47:27,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:47:27,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 211 treesize of output 155 [2022-11-19 06:47:29,292 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-11-19 06:47:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 202 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:47:32,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426339529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:47:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113474571] [2022-11-19 06:47:32,510 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:47:32,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:47:32,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:47:32,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:47:32,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:47:32,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:47:32,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:47:32,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:47:32,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:47:32,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:47:34,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17128#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:47:34,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:47:34,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:47:34,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 57, 57] total 153 [2022-11-19 06:47:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683042888] [2022-11-19 06:47:34,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:47:34,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-11-19 06:47:34,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:47:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-11-19 06:47:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=23791, Unknown=26, NotChecked=0, Total=25440 [2022-11-19 06:47:34,425 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:16,871 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2022-11-19 06:50:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 06:50:16,871 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-19 06:50:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:16,872 INFO L225 Difference]: With dead ends: 127 [2022-11-19 06:50:16,872 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 06:50:16,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8311 ImplicationChecksByTransitivity, 200.8s TimeCoverageRelationStatistics Valid=2955, Invalid=43364, Unknown=121, NotChecked=0, Total=46440 [2022-11-19 06:50:16,874 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 156 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2829 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 812 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:16,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 53 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2829 Invalid, 0 Unknown, 812 Unchecked, 1.5s Time] [2022-11-19 06:50:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 06:50:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-19 06:50:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-19 06:50:16,877 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-11-19 06:50:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:16,877 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-19 06:50:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-19 06:50:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 06:50:16,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:16,879 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1] [2022-11-19 06:50:16,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:17,087 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:50:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash -578614433, now seen corresponding path program 37 times [2022-11-19 06:50:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396588944] [2022-11-19 06:50:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 324 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:19,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396588944] [2022-11-19 06:50:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396588944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385026118] [2022-11-19 06:50:19,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:50:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:19,213 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:19,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 06:50:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-19 06:50:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:19,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:50:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:23,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385026118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766583938] [2022-11-19 06:50:23,298 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:50:23,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:23,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:23,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:23,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:23,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:50:23,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:50:23,360 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 14 treesize of output 10 [2022-11-19 06:50:23,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:23,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:24,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18069#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:50:24,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:24,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:50:24,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 108 [2022-11-19 06:50:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28467580] [2022-11-19 06:50:24,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:24,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-19 06:50:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:24,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-19 06:50:24,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1693, Invalid=11647, Unknown=0, NotChecked=0, Total=13340 [2022-11-19 06:50:24,473 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:26,949 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-11-19 06:50:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 06:50:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-19 06:50:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:26,950 INFO L225 Difference]: With dead ends: 88 [2022-11-19 06:50:26,950 INFO L226 Difference]: Without dead ends: 88 [2022-11-19 06:50:26,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5791 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3464, Invalid=15718, Unknown=0, NotChecked=0, Total=19182 [2022-11-19 06:50:26,951 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 210 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:26,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 0 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:50:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-19 06:50:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-11-19 06:50:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-11-19 06:50:26,954 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-11-19 06:50:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:26,955 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-11-19 06:50:26,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-11-19 06:50:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 06:50:26,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:26,956 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2022-11-19 06:50:26,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-19 06:50:27,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:27,158 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:50:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1997689512, now seen corresponding path program 38 times [2022-11-19 06:50:27,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:27,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427353879] [2022-11-19 06:50:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:27,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:29,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427353879] [2022-11-19 06:50:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427353879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749508751] [2022-11-19 06:50:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:50:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:29,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:29,206 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:29,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 06:50:30,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-19 06:50:30,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:50:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-19 06:50:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:31,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:31,596 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 [2022-11-19 06:50:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:31,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:31,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-19 06:50:31,744 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 [2022-11-19 06:50:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:32,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749508751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:32,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480851165] [2022-11-19 06:50:32,059 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:50:32,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:32,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:32,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:32,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:32,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:50:32,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:32,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:32,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:32,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:33,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18880#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:50:33,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:33,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:50:33,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 73 [2022-11-19 06:50:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166669066] [2022-11-19 06:50:33,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:33,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 06:50:33,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 06:50:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6114, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 06:50:33,108 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:37,529 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-11-19 06:50:37,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-19 06:50:37,529 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-19 06:50:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:37,530 INFO L225 Difference]: With dead ends: 133 [2022-11-19 06:50:37,530 INFO L226 Difference]: Without dead ends: 90 [2022-11-19 06:50:37,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=543, Invalid=14463, Unknown=0, NotChecked=0, Total=15006 [2022-11-19 06:50:37,531 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 174 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:37,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 36 Invalid, 4751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4639 Invalid, 0 Unknown, 89 Unchecked, 2.0s Time] [2022-11-19 06:50:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-19 06:50:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-11-19 06:50:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-19 06:50:37,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2022-11-19 06:50:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:37,534 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-19 06:50:37,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8513513513513513) internal successors, (137), 73 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-19 06:50:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:50:37,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:37,535 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1] [2022-11-19 06:50:37,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:37,735 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:50:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash -491641037, now seen corresponding path program 39 times [2022-11-19 06:50:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788387617] [2022-11-19 06:50:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 361 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:39,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788387617] [2022-11-19 06:50:39,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788387617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:39,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177144197] [2022-11-19 06:50:39,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:50:39,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:39,385 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:39,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 06:50:41,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:50:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:50:41,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-19 06:50:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:41,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:50:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 400 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:46,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177144197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:46,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736837671] [2022-11-19 06:50:46,222 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:50:46,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:46,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:46,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:46,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:46,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:50:46,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:50:46,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:46,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:46,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:47,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19829#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:50:47,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:47,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:50:47,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 111 [2022-11-19 06:50:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979728919] [2022-11-19 06:50:47,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-19 06:50:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-19 06:50:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1837, Invalid=12205, Unknown=0, NotChecked=0, Total=14042 [2022-11-19 06:50:47,682 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:49,868 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-11-19 06:50:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 06:50:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-19 06:50:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:49,869 INFO L225 Difference]: With dead ends: 92 [2022-11-19 06:50:49,869 INFO L226 Difference]: Without dead ends: 92 [2022-11-19 06:50:49,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3767, Invalid=16539, Unknown=0, NotChecked=0, Total=20306 [2022-11-19 06:50:49,871 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 415 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2618 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:49,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2618 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:50:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-19 06:50:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-11-19 06:50:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-11-19 06:50:49,872 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2022-11-19 06:50:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:49,873 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-11-19 06:50:49,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 112 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-11-19 06:50:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 06:50:49,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:49,873 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2022-11-19 06:50:49,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-19 06:50:50,074 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:50:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash -20634580, now seen corresponding path program 40 times [2022-11-19 06:50:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:50,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339040771] [2022-11-19 06:50:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:52,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339040771] [2022-11-19 06:50:52,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339040771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840825836] [2022-11-19 06:50:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:50:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:52,384 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:52,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 06:50:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-19 06:50:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:53,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:54,126 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 [2022-11-19 06:50:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:54,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:54,265 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 [2022-11-19 06:50:54,266 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 [2022-11-19 06:50:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 22 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:54,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840825836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:54,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163647454] [2022-11-19 06:50:54,590 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:50:54,590 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:54,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:54,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:54,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:54,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:50:54,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:54,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:54,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:54,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:50:54,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:50:55,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20677#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:50:55,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:50:55,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:50:55,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 76 [2022-11-19 06:50:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785252006] [2022-11-19 06:50:55,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:55,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-19 06:50:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-19 06:50:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=6593, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 06:50:55,648 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:00,505 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-11-19 06:51:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 06:51:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-19 06:51:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:00,507 INFO L225 Difference]: With dead ends: 139 [2022-11-19 06:51:00,507 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 06:51:00,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=565, Invalid=15691, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 06:51:00,509 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 136 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5342 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 49 Invalid, 5418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5342 Invalid, 0 Unknown, 53 Unchecked, 2.3s Time] [2022-11-19 06:51:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 06:51:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-11-19 06:51:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-19 06:51:00,512 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2022-11-19 06:51:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:00,512 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-19 06:51:00,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.8571428571428572) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-19 06:51:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 06:51:00,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:00,513 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1] [2022-11-19 06:51:00,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-19 06:51:00,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-19 06:51:00,718 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:51:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1951188857, now seen corresponding path program 41 times [2022-11-19 06:51:00,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:00,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637008251] [2022-11-19 06:51:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:00,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 400 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:02,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637008251] [2022-11-19 06:51:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637008251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300669918] [2022-11-19 06:51:02,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:51:02,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:02,507 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 06:51:03,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-19 06:51:03,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-19 06:51:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:05,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:07,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-19 06:51:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 441 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300669918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024286208] [2022-11-19 06:51:08,195 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:51:08,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:08,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:08,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:08,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:51:08,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:51:08,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:51:08,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:51:08,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:51:08,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:51:08,363 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:09,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21670#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:51:09,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:09,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:09,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 117 [2022-11-19 06:51:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243375113] [2022-11-19 06:51:09,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-19 06:51:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-19 06:51:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=13227, Unknown=0, NotChecked=0, Total=15500 [2022-11-19 06:51:09,144 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:10,839 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-11-19 06:51:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 06:51:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-19 06:51:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:10,841 INFO L225 Difference]: With dead ends: 96 [2022-11-19 06:51:10,841 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 06:51:10,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 174 SyntacticMatches, 23 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8984 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4114, Invalid=18236, Unknown=0, NotChecked=0, Total=22350 [2022-11-19 06:51:10,843 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 271 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:10,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:51:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 06:51:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-11-19 06:51:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-11-19 06:51:10,845 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2022-11-19 06:51:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:10,846 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-11-19 06:51:10,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 1.9491525423728813) internal successors, (230), 118 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-11-19 06:51:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 06:51:10,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:10,847 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2022-11-19 06:51:10,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-19 06:51:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-19 06:51:11,055 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-19 06:51:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1808216192, now seen corresponding path program 42 times [2022-11-19 06:51:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429012465] [2022-11-19 06:51:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 23 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:13,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429012465] [2022-11-19 06:51:13,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429012465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976423899] [2022-11-19 06:51:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:51:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:13,401 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_486e7624-1084-4dfc-b12e-6353d477723f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 06:51:14,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:51:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:51:14,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 203 conjunts are in the unsatisfiable core [2022-11-19 06:51:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:52:04,197 INFO L321 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2022-11-19 06:52:04,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 198 treesize of output 102 [2022-11-19 06:52:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 24 proven. 950 refuted. 39 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:04,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:24,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 248 [2022-11-19 06:52:24,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:52:24,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 286 treesize of output 210 [2022-11-19 06:52:28,560 WARN L718 sPolynomialRelations]: Constructing 524288(two to the power of 19 dual juncts. [2022-11-19 06:52:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 365 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976423899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921759240] [2022-11-19 06:52:56,831 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:52:56,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:56,831 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:56,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:56,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:56,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 06:52:56,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:52:56,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:52:56,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-19 06:52:56,998 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:59,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22657#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:52:59,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:59,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:52:59,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 68, 68] total 181 [2022-11-19 06:52:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115872516] [2022-11-19 06:52:59,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:59,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-11-19 06:52:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-11-19 06:52:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2329, Invalid=32756, Unknown=71, NotChecked=0, Total=35156 [2022-11-19 06:52:59,155 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 182 states, 182 states have (on average 1.521978021978022) internal successors, (277), 181 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:46,438 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 95 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:00,454 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 98 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:12,228 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 100 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:28,107 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 103 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:41,353 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 105 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:59,626 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:56:14,309 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 110 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:56:34,359 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 113 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:56:50,908 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 115 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)