./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:02:28,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:02:28,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:02:28,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:02:28,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:02:28,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:02:28,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:02:28,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:02:28,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:02:28,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:02:28,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:02:28,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:02:28,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:02:28,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:02:28,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:02:28,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:02:28,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:02:28,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:02:28,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:02:28,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:02:28,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:02:28,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:02:28,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:02:28,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:02:28,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:02:28,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:02:28,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:02:28,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:02:28,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:02:28,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:02:28,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:02:28,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:02:28,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:02:28,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:02:28,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:02:28,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:02:28,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:02:28,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:02:28,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:02:28,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:02:28,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:02:28,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 12:02:28,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:02:28,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:02:28,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:02:28,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:02:28,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:02:28,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:02:28,129 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:02:28,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:02:28,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:02:28,131 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:02:28,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:02:28,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:02:28,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:02:28,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:02:28,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:02:28,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:02:28,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:02:28,132 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:02:28,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:02:28,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:02:28,133 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:02:28,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:02:28,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:02:28,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:02:28,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:02:28,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:02:28,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:02:28,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:02:28,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:02:28,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:02:28,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:02:28,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:02:28,135 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_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2022-12-14 12:02:28,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:02:28,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:02:28,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:02:28,336 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:02:28,336 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:02:28,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-12-14 12:02:30,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:02:31,138 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:02:31,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-12-14 12:02:31,149 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/data/310f0e81b/577c981fd7294eb4a66744b3e5084470/FLAGee925000a [2022-12-14 12:02:31,159 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/data/310f0e81b/577c981fd7294eb4a66744b3e5084470 [2022-12-14 12:02:31,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:02:31,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:02:31,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:02:31,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:02:31,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:02:31,166 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554bd753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31, skipping insertion in model container [2022-12-14 12:02:31,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:02:31,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:02:31,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:02:31,447 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:02:31,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:02:31,498 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:02:31,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31 WrapperNode [2022-12-14 12:02:31,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:02:31,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:02:31,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:02:31,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:02:31,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,531 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-12-14 12:02:31,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:02:31,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:02:31,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:02:31,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:02:31,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:02:31,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:02:31,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:02:31,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:02:31,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (1/1) ... [2022-12-14 12:02:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:02:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:31,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:02:31,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:02:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:02:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:02:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:02:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:02:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:02:31,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:02:31,705 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:02:31,707 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:02:31,859 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:02:31,928 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:02:31,928 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 12:02:31,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:02:31 BoogieIcfgContainer [2022-12-14 12:02:31,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:02:31,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:02:31,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:02:31,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:02:31,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:02:31" (1/3) ... [2022-12-14 12:02:31,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ead1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:02:31, skipping insertion in model container [2022-12-14 12:02:31,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:02:31" (2/3) ... [2022-12-14 12:02:31,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ead1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:02:31, skipping insertion in model container [2022-12-14 12:02:31,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:02:31" (3/3) ... [2022-12-14 12:02:31,940 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2022-12-14 12:02:31,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:02:31,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-14 12:02:31,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:02:31,997 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;@5aacf48f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:02:31,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-14 12:02:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 2.2) internal successors, (33), 28 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) [2022-12-14 12:02:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:02:32,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:32,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:02:32,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash 136239, now seen corresponding path program 1 times [2022-12-14 12:02:32,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:32,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725893672] [2022-12-14 12:02:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:32,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:32,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:32,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725893672] [2022-12-14 12:02:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725893672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:32,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:32,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:02:32,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371624654] [2022-12-14 12:02:32,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:02:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:02:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:32,334 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 2.2) internal successors, (33), 28 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:32,379 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-12-14 12:02:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:02:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 12:02:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:32,386 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:02:32,386 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 12:02:32,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:32,390 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:32,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 12:02:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 12:02:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-14 12:02:32,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2022-12-14 12:02:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:32,411 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-14 12:02:32,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-14 12:02:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:02:32,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:32,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:02:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:02:32,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:32,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 136240, now seen corresponding path program 1 times [2022-12-14 12:02:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:32,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457991922] [2022-12-14 12:02:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:32,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457991922] [2022-12-14 12:02:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457991922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:32,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:02:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526980325] [2022-12-14 12:02:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:32,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:02:32,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:32,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:02:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:02:32,578 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:32,672 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-12-14 12:02:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:02:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 12:02:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:32,673 INFO L225 Difference]: With dead ends: 50 [2022-12-14 12:02:32,673 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 12:02:32,673 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 [2022-12-14 12:02:32,675 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:32,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 37 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 12:02:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2022-12-14 12:02:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 12:02:32,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2022-12-14 12:02:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 12:02:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 12:02:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:02:32,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:32,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:02:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:02:32,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash 4303711, now seen corresponding path program 1 times [2022-12-14 12:02:32,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:32,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220077968] [2022-12-14 12:02:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:32,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:32,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220077968] [2022-12-14 12:02:32,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220077968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:32,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:02:32,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699326960] [2022-12-14 12:02:32,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:32,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:02:32,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:32,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:02:32,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:32,723 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:32,745 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-14 12:02:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:02:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 12:02:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:32,746 INFO L225 Difference]: With dead ends: 26 [2022-12-14 12:02:32,746 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 12:02:32,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:32,747 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:32,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 12:02:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 12:02:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 12:02:32,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 4 [2022-12-14 12:02:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:32,752 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 12:02:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 12:02:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:02:32,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:32,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:02:32,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:02:32,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 4303712, now seen corresponding path program 1 times [2022-12-14 12:02:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100369065] [2022-12-14 12:02:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:32,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:32,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:32,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100369065] [2022-12-14 12:02:32,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100369065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:32,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:32,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:02:32,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741080531] [2022-12-14 12:02:32,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:32,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:02:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:32,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:02:32,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:02:32,911 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:32,988 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-12-14 12:02:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:02:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 12:02:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:32,989 INFO L225 Difference]: With dead ends: 45 [2022-12-14 12:02:32,989 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 12:02:32,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:02:32,991 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:32,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 12:02:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2022-12-14 12:02:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.736842105263158) internal successors, (33), 27 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) [2022-12-14 12:02:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 12:02:32,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 4 [2022-12-14 12:02:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:32,996 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 12:02:32,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 12:02:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 12:02:32,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:32,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 12:02:32,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:02:32,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash 4305767, now seen corresponding path program 1 times [2022-12-14 12:02:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:32,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996081468] [2022-12-14 12:02:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:33,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:33,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996081468] [2022-12-14 12:02:33,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996081468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:33,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:33,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:02:33,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100061877] [2022-12-14 12:02:33,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:02:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:02:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:02:33,157 INFO L87 Difference]: Start difference. First operand 28 states and 33 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) [2022-12-14 12:02:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:33,185 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 12:02:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:02:33,186 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 [2022-12-14 12:02:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:33,186 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:02:33,186 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 12:02:33,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:02:33,188 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:33,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 12:02:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 12:02:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 12:02:33,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 4 [2022-12-14 12:02:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:33,192 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 12:02:33,192 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) [2022-12-14 12:02:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 12:02:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:02:33,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:33,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 12:02:33,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:02:33,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 130993688, now seen corresponding path program 1 times [2022-12-14 12:02:33,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:33,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132624452] [2022-12-14 12:02:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:33,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:33,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132624452] [2022-12-14 12:02:33,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132624452] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935387494] [2022-12-14 12:02:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:33,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:33,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:33,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:33,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:02:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:33,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:02:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:33,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:33,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 12:02:33,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:02:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:33,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:33,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935387494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983717068] [2022-12-14 12:02:33,766 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 12:02:33,766 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:33,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:33,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:33,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:33,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:33,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:33,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:02:33,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:33,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:34,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '400#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:34,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:34,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:34,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 12:02:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462250143] [2022-12-14 12:02:34,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:02:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:02:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:02:34,144 INFO L87 Difference]: Start difference. First operand 27 states and 32 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) [2022-12-14 12:02:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:34,347 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-12-14 12:02:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:02:34,347 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 [2022-12-14 12:02:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:34,348 INFO L225 Difference]: With dead ends: 69 [2022-12-14 12:02:34,348 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 12:02:34,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:02:34,349 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 156 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:34,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 100 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 12:02:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 24. [2022-12-14 12:02:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 12:02:34,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2022-12-14 12:02:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:34,351 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 12:02:34,351 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) [2022-12-14 12:02:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 12:02:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:02:34,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:34,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:02:34,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:02:34,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:34,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash 133478771, now seen corresponding path program 1 times [2022-12-14 12:02:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:34,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922133513] [2022-12-14 12:02:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:34,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922133513] [2022-12-14 12:02:34,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922133513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:34,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:34,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:02:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752492992] [2022-12-14 12:02:34,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:34,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:02:34,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:02:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:34,661 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:34,682 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 12:02:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:02:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:02:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:34,683 INFO L225 Difference]: With dead ends: 23 [2022-12-14 12:02:34,683 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 12:02:34,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:02:34,684 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:34,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 12:02:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 12:02:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 12:02:34,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2022-12-14 12:02:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:34,687 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 12:02:34,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 12:02:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:02:34,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:34,688 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 12:02:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:02:34,688 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash -159043011, now seen corresponding path program 1 times [2022-12-14 12:02:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930860481] [2022-12-14 12:02:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:34,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930860481] [2022-12-14 12:02:34,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930860481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:34,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185554846] [2022-12-14 12:02:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:34,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:34,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:34,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:34,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:02:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:02:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:34,918 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 12:02:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 12:02:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:35,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:35,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185554846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178224772] [2022-12-14 12:02:35,164 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 12:02:35,164 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:35,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:35,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:35,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:35,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:35,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:35,244 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 11 treesize of output 7 [2022-12-14 12:02:35,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:35,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:35,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:35,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_#t~nondet13#1| 127) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet13#1|)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:35,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:35,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:35,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 12:02:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236751689] [2022-12-14 12:02:35,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:02:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:02:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:02:35,683 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:35,863 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-12-14 12:02:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:02:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:02:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:35,864 INFO L225 Difference]: With dead ends: 53 [2022-12-14 12:02:35,864 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 12:02:35,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:02:35,865 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:35,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 12:02:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 20. [2022-12-14 12:02:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 12:02:35,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2022-12-14 12:02:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:35,868 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 12:02:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 12:02:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:02:35,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:35,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:35,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:02:36,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:36,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -575881541, now seen corresponding path program 1 times [2022-12-14 12:02:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173033398] [2022-12-14 12:02:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173033398] [2022-12-14 12:02:36,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173033398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:02:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851920341] [2022-12-14 12:02:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:02:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:02:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:02:36,137 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:36,178 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-12-14 12:02:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:02:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:02:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:36,179 INFO L225 Difference]: With dead ends: 19 [2022-12-14 12:02:36,179 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:02:36,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:02:36,179 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:36,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:02:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 12:02:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 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) [2022-12-14 12:02:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 12:02:36,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-12-14 12:02:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:36,182 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 12:02:36,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 12:02:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:02:36,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:36,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:36,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:02:36,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash -575881540, now seen corresponding path program 1 times [2022-12-14 12:02:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765225577] [2022-12-14 12:02:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765225577] [2022-12-14 12:02:36,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765225577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:02:36,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615604768] [2022-12-14 12:02:36,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:02:36,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:02:36,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:02:36,276 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:36,329 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 12:02:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:02:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:02:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:36,330 INFO L225 Difference]: With dead ends: 21 [2022-12-14 12:02:36,330 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 12:02:36,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:02:36,331 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:36,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 12:02:36,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 12:02:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 12:02:36,333 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2022-12-14 12:02:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:36,333 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 12:02:36,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 12:02:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:02:36,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:36,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:36,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:02:36,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash 628657025, now seen corresponding path program 1 times [2022-12-14 12:02:36,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154138371] [2022-12-14 12:02:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154138371] [2022-12-14 12:02:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154138371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:02:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617587598] [2022-12-14 12:02:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:02:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:02:36,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:02:36,382 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:36,420 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-14 12:02:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:02:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:02:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:36,421 INFO L225 Difference]: With dead ends: 20 [2022-12-14 12:02:36,421 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 12:02:36,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:02:36,422 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:36,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 12:02:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 12:02:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 12:02:36,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2022-12-14 12:02:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:36,424 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 12:02:36,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 12:02:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:02:36,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:36,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:36,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:02:36,425 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash 628657026, now seen corresponding path program 1 times [2022-12-14 12:02:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348195537] [2022-12-14 12:02:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348195537] [2022-12-14 12:02:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348195537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:02:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775479630] [2022-12-14 12:02:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:02:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:02:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:02:36,540 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:36,590 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 12:02:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:02:36,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:02:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:36,591 INFO L225 Difference]: With dead ends: 23 [2022-12-14 12:02:36,591 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 12:02:36,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:02:36,591 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:36,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 12:02:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-12-14 12:02:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 12:02:36,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2022-12-14 12:02:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:36,594 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 12:02:36,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 12:02:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:02:36,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:36,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:36,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:02:36,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2030007838, now seen corresponding path program 1 times [2022-12-14 12:02:36,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367220176] [2022-12-14 12:02:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367220176] [2022-12-14 12:02:36,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367220176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:02:36,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889486215] [2022-12-14 12:02:36,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:02:36,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:02:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:02:36,697 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-12-14 12:02:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:36,713 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 12:02:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:02:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) Word has length 12 [2022-12-14 12:02:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:36,714 INFO L225 Difference]: With dead ends: 21 [2022-12-14 12:02:36,714 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 12:02:36,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:02:36,714 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:36,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 12:02:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 12:02:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 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) [2022-12-14 12:02:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 12:02:36,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-12-14 12:02:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:36,717 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 12:02:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-12-14 12:02:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 12:02:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:02:36,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:36,717 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:36,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:02:36,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1494307142, now seen corresponding path program 1 times [2022-12-14 12:02:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:36,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318854402] [2022-12-14 12:02:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:36,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:36,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318854402] [2022-12-14 12:02:36,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318854402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:36,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:36,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:02:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997181081] [2022-12-14 12:02:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:36,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:02:36,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:36,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:02:36,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:02:36,871 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:37,076 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 12:02:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:02:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:02:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:37,077 INFO L225 Difference]: With dead ends: 28 [2022-12-14 12:02:37,077 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 12:02:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:02:37,078 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:02:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 12:02:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-12-14 12:02:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 12:02:37,080 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-12-14 12:02:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:37,080 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 12:02:37,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 12:02:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:02:37,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:37,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:37,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:02:37,081 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash 315306761, now seen corresponding path program 1 times [2022-12-14 12:02:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132405831] [2022-12-14 12:02:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:37,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132405831] [2022-12-14 12:02:37,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132405831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518694974] [2022-12-14 12:02:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:37,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:37,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:02:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 12:02:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:37,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:37,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:02:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:37,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518694974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:37,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576326234] [2022-12-14 12:02:37,639 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:02:37,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:37,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:37,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:37,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:37,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:37,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:02:37,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:37,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:37,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:37,852 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:02:37,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:02:38,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:40,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:40,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:40,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:40,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-12-14 12:02:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729331871] [2022-12-14 12:02:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:02:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:02:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:02:40,094 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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) [2022-12-14 12:02:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:40,305 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-12-14 12:02:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:02:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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 15 [2022-12-14 12:02:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:40,306 INFO L225 Difference]: With dead ends: 29 [2022-12-14 12:02:40,306 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 12:02:40,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:02:40,308 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:40,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 46 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 12:02:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-12-14 12:02:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 12:02:40,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-12-14 12:02:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:40,310 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 12:02:40,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 21 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) [2022-12-14 12:02:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 12:02:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:02:40,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:40,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:40,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:02:40,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:02:40,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash 315304583, now seen corresponding path program 1 times [2022-12-14 12:02:40,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:40,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990634089] [2022-12-14 12:02:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:40,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:40,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:40,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990634089] [2022-12-14 12:02:40,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990634089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:02:40,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:02:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:02:40,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826888535] [2022-12-14 12:02:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:02:40,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:02:40,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:02:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:02:40,712 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2022-12-14 12:02:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:40,870 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-12-14 12:02:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:02:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 12:02:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:40,871 INFO L225 Difference]: With dead ends: 44 [2022-12-14 12:02:40,871 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 12:02:40,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:02:40,872 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:40,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 12:02:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-14 12:02:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-14 12:02:40,875 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 15 [2022-12-14 12:02:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:40,875 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-14 12:02:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2022-12-14 12:02:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-14 12:02:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:02:40,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:40,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:40,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 12:02:40,876 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1626847121, now seen corresponding path program 1 times [2022-12-14 12:02:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:40,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239462046] [2022-12-14 12:02:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:40,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:41,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239462046] [2022-12-14 12:02:41,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239462046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953696681] [2022-12-14 12:02:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:41,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:41,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:41,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:41,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:02:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 12:02:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:41,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:02:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:41,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953696681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:41,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201193895] [2022-12-14 12:02:41,329 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:02:41,329 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:41,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:41,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:41,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:41,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:41,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:41,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:41,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:02:41,492 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:02:41,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:02:41,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:41,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:41,630 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:02:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:02:41,765 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:02:41,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:02:43,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:44,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1399#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:44,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:44,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:44,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-14 12:02:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707201022] [2022-12-14 12:02:44,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:02:44,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:44,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:02:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:02:44,921 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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) [2022-12-14 12:02:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:45,160 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-12-14 12:02:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:02:45,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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) Word has length 17 [2022-12-14 12:02:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:45,161 INFO L225 Difference]: With dead ends: 57 [2022-12-14 12:02:45,161 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 12:02:45,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:02:45,162 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:45,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 120 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 12:02:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-12-14 12:02:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 53 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) [2022-12-14 12:02:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-12-14 12:02:45,164 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 17 [2022-12-14 12:02:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:45,164 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-12-14 12:02:45,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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) [2022-12-14 12:02:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-12-14 12:02:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 12:02:45,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:45,165 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:45,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:02:45,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:02:45,367 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2044273331, now seen corresponding path program 2 times [2022-12-14 12:02:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289219260] [2022-12-14 12:02:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:45,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289219260] [2022-12-14 12:02:45,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289219260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004908862] [2022-12-14 12:02:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:02:45,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:45,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:45,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:45,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:02:45,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:02:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:02:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 12:02:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:45,696 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:02:45,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:02:45,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:02:46,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:02:46,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2022-12-14 12:02:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:46,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:46,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 12:02:46,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 12:02:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004908862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890760525] [2022-12-14 12:02:46,556 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:02:46,556 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:46,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:46,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:46,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:46,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:46,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:46,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:02:46,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:46,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:46,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:46,729 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:02:46,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:02:46,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:48,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1676#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:48,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:48,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:48,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-12-14 12:02:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626538866] [2022-12-14 12:02:48,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:48,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 12:02:48,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 12:02:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 12:02:48,380 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:48,965 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2022-12-14 12:02:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:02:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 12:02:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:48,965 INFO L225 Difference]: With dead ends: 94 [2022-12-14 12:02:48,965 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 12:02:48,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=378, Invalid=2484, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:02:48,966 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 145 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:48,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 104 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 12:02:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-12-14 12:02:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 73 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) [2022-12-14 12:02:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-12-14 12:02:48,969 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 19 [2022-12-14 12:02:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:48,969 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-12-14 12:02:48,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-12-14 12:02:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:02:48,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:48,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:48,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:02:49,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:02:49,170 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash -158129968, now seen corresponding path program 3 times [2022-12-14 12:02:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478155810] [2022-12-14 12:02:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:49,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:49,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478155810] [2022-12-14 12:02:49,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478155810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457488941] [2022-12-14 12:02:49,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:02:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:49,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:49,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:02:49,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:02:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:02:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 12:02:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:49,455 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:02:49,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:02:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:49,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:02:49,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457488941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:49,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219650421] [2022-12-14 12:02:49,716 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:02:49,716 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:49,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:49,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:49,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:49,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:49,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:02:49,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:49,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:49,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:49,875 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:02:49,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:02:49,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:51,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2021#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:51,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:51,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:51,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-12-14 12:02:51,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703624606] [2022-12-14 12:02:51,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 12:02:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 12:02:51,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:02:51,392 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:51,711 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2022-12-14 12:02:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:02:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 12:02:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:51,712 INFO L225 Difference]: With dead ends: 100 [2022-12-14 12:02:51,712 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 12:02:51,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=338, Invalid=2014, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 12:02:51,713 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:51,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 106 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 12:02:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2022-12-14 12:02:51,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 85 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2022-12-14 12:02:51,717 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 21 [2022-12-14 12:02:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:51,718 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2022-12-14 12:02:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2022-12-14 12:02:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 12:02:51,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:51,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:51,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:02:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:51,920 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1663205321, now seen corresponding path program 2 times [2022-12-14 12:02:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:51,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845132947] [2022-12-14 12:02:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:51,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:52,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845132947] [2022-12-14 12:02:52,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845132947] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186049240] [2022-12-14 12:02:52,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:02:52,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:52,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:52,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:02:52,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:02:52,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:02:52,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:02:52,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:52,342 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 10 treesize of output 8 [2022-12-14 12:02:52,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:52,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:02:52,596 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 [2022-12-14 12:02:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:52,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:52,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:02:52,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:02:52,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:02:52,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 12:02:52,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:02:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186049240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131161725] [2022-12-14 12:02:52,949 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:02:52,949 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:52,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:52,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:52,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:52,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:52,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:52,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:02:53,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:53,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:53,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:02:53,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:53,108 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 [2022-12-14 12:02:53,172 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:02:53,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:02:53,287 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:02:53,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:02:54,322 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:02:56,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2401#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:02:56,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:02:56,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:02:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-12-14 12:02:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545772056] [2022-12-14 12:02:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:02:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 12:02:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:02:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 12:02:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 12:02:56,184 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) 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) [2022-12-14 12:02:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:02:56,688 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2022-12-14 12:02:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 12:02:56,689 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) 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 23 [2022-12-14 12:02:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:02:56,689 INFO L225 Difference]: With dead ends: 145 [2022-12-14 12:02:56,689 INFO L226 Difference]: Without dead ends: 131 [2022-12-14 12:02:56,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=350, Invalid=2730, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:02:56,690 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:02:56,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 235 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:02:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-14 12:02:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2022-12-14 12:02:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.201834862385321) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:02:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-12-14 12:02:56,693 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 23 [2022-12-14 12:02:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:02:56,693 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-12-14 12:02:56,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) 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) [2022-12-14 12:02:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-12-14 12:02:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:02:56,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:02:56,694 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:02:56,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:02:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:56,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:02:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:02:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1162725857, now seen corresponding path program 3 times [2022-12-14 12:02:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:02:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146529180] [2022-12-14 12:02:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:02:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:02:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:02:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:57,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:02:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146529180] [2022-12-14 12:02:57,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146529180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:02:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899376192] [2022-12-14 12:02:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:02:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:02:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:02:57,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:02:57,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:02:57,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:02:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:02:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 12:02:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:02:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:02:57,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:02:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:02:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899376192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:02:57,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [648149476] [2022-12-14 12:02:57,362 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:02:57,362 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:02:57,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:02:57,362 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:02:57,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:02:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:02:57,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:02:57,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:57,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:57,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:02:57,483 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:02:57,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:02:57,526 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 [2022-12-14 12:02:57,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:02:57,616 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:02:57,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:02:57,726 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:02:57,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:02:58,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:00,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2863#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:00,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:00,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:00,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-14 12:03:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131650150] [2022-12-14 12:03:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:00,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:03:00,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:03:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:03:00,423 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:00,680 INFO L93 Difference]: Finished difference Result 153 states and 174 transitions. [2022-12-14 12:03:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:03:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 12:03:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:00,682 INFO L225 Difference]: With dead ends: 153 [2022-12-14 12:03:00,682 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 12:03:00,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:03:00,683 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 180 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:00,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 195 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:03:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 12:03:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-12-14 12:03:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 132 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2022-12-14 12:03:00,687 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 25 [2022-12-14 12:03:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:00,687 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2022-12-14 12:03:00,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2022-12-14 12:03:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:03:00,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:00,688 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:00,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:03:00,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 12:03:00,890 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:00,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1160023956, now seen corresponding path program 4 times [2022-12-14 12:03:00,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819402781] [2022-12-14 12:03:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:00,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:01,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819402781] [2022-12-14 12:03:01,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819402781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125225300] [2022-12-14 12:03:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:03:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:01,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:01,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:03:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 12:03:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:01,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:01,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:03:01,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-12-14 12:03:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:01,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:02,015 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 [2022-12-14 12:03:02,019 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 [2022-12-14 12:03:02,022 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 35 treesize of output 27 [2022-12-14 12:03:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:02,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125225300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780814564] [2022-12-14 12:03:02,055 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:03:02,055 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:02,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:02,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:02,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:02,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:02,108 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 11 treesize of output 7 [2022-12-14 12:03:02,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:02,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:02,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:02,220 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:03:02,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:03:02,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:04,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3358#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:04,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:04,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:04,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-12-14 12:03:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144380342] [2022-12-14 12:03:04,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:04,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:03:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:03:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 12:03:04,536 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:05,922 INFO L93 Difference]: Finished difference Result 280 states and 313 transitions. [2022-12-14 12:03:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:03:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 12:03:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:05,923 INFO L225 Difference]: With dead ends: 280 [2022-12-14 12:03:05,924 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 12:03:05,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=599, Invalid=4657, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 12:03:05,925 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 338 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:05,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 270 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:03:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 12:03:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 193. [2022-12-14 12:03:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 191 states have (on average 1.1832460732984293) internal successors, (226), 192 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2022-12-14 12:03:05,931 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 25 [2022-12-14 12:03:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:05,931 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2022-12-14 12:03:05,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2022-12-14 12:03:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:03:05,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:05,932 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:05,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:03:06,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:03:06,134 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash 418015719, now seen corresponding path program 4 times [2022-12-14 12:03:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:06,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127188417] [2022-12-14 12:03:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:06,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:07,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127188417] [2022-12-14 12:03:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127188417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210349846] [2022-12-14 12:03:07,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:03:07,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:07,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:07,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:03:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 12:03:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:07,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:03:07,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:07,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 12:03:07,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:03:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:07,560 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_358 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_358) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 12:03:07,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:03:07,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:03:07,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:03:07,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 12:03:07,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:03:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:07,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210349846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877562786] [2022-12-14 12:03:07,749 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:03:07,749 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:07,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:07,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:07,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:07,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:07,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:07,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:07,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:07,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:03:07,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:07,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:07,969 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:03:07,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:03:08,088 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:03:08,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:03:09,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:11,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4115#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:11,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:11,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:11,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 41 [2022-12-14 12:03:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878570671] [2022-12-14 12:03:11,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 12:03:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 12:03:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2707, Unknown=1, NotChecked=104, Total=2970 [2022-12-14 12:03:11,241 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:14,929 INFO L93 Difference]: Finished difference Result 344 states and 388 transitions. [2022-12-14 12:03:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 12:03:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 12:03:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:14,931 INFO L225 Difference]: With dead ends: 344 [2022-12-14 12:03:14,931 INFO L226 Difference]: Without dead ends: 291 [2022-12-14 12:03:14,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=813, Invalid=8891, Unknown=2, NotChecked=194, Total=9900 [2022-12-14 12:03:14,934 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 401 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 9 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:14,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 483 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1673 Invalid, 27 Unknown, 79 Unchecked, 0.8s Time] [2022-12-14 12:03:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-14 12:03:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2022-12-14 12:03:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.1891891891891893) internal successors, (264), 223 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 264 transitions. [2022-12-14 12:03:14,938 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 264 transitions. Word has length 31 [2022-12-14 12:03:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:14,938 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 264 transitions. [2022-12-14 12:03:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 264 transitions. [2022-12-14 12:03:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:03:14,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:14,939 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:14,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:03:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:15,140 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:15,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -514525157, now seen corresponding path program 5 times [2022-12-14 12:03:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:15,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459436091] [2022-12-14 12:03:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:15,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459436091] [2022-12-14 12:03:15,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459436091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191332935] [2022-12-14 12:03:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:03:15,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:15,453 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:15,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:03:15,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 12:03:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 12:03:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:15,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:15,774 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 [2022-12-14 12:03:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:15,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:15,822 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 [2022-12-14 12:03:15,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:03:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:15,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191332935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382454430] [2022-12-14 12:03:15,886 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:03:15,886 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:15,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:15,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:15,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:15,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:15,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:15,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:15,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:16,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:16,052 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:03:16,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:03:16,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:17,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4995#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:17,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:17,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:17,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2022-12-14 12:03:17,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731894449] [2022-12-14 12:03:17,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:17,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:03:17,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:17,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:03:17,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:03:17,780 INFO L87 Difference]: Start difference. First operand 224 states and 264 transitions. Second operand has 29 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) [2022-12-14 12:03:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:18,220 INFO L93 Difference]: Finished difference Result 377 states and 428 transitions. [2022-12-14 12:03:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 12:03:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 29 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 31 [2022-12-14 12:03:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:18,221 INFO L225 Difference]: With dead ends: 377 [2022-12-14 12:03:18,222 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 12:03:18,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=322, Invalid=2540, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:03:18,223 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:18,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 464 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:03:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 12:03:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 278. [2022-12-14 12:03:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.181159420289855) internal successors, (326), 277 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 326 transitions. [2022-12-14 12:03:18,228 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 326 transitions. Word has length 31 [2022-12-14 12:03:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:18,228 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 326 transitions. [2022-12-14 12:03:18,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 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) [2022-12-14 12:03:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 326 transitions. [2022-12-14 12:03:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:03:18,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:18,229 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:18,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:03:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 12:03:18,430 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash -482428977, now seen corresponding path program 5 times [2022-12-14 12:03:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:18,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381562771] [2022-12-14 12:03:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:18,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:18,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381562771] [2022-12-14 12:03:18,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381562771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:18,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499919653] [2022-12-14 12:03:18,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:03:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:18,663 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:18,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:03:18,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:03:18,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 12:03:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:18,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:19,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 12:03:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:19,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499919653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419039702] [2022-12-14 12:03:19,128 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:03:19,128 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:19,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:19,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:19,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:19,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:19,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:19,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:19,248 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:03:19,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:03:19,281 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 [2022-12-14 12:03:19,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:19,363 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:03:19,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:03:19,475 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:03:19,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:03:20,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:22,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5911#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:22,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:22,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:22,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-14 12:03:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903180610] [2022-12-14 12:03:22,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 12:03:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 12:03:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:03:22,006 INFO L87 Difference]: Start difference. First operand 278 states and 326 transitions. Second operand has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 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) [2022-12-14 12:03:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:22,404 INFO L93 Difference]: Finished difference Result 394 states and 451 transitions. [2022-12-14 12:03:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:03:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 12:03:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:22,406 INFO L225 Difference]: With dead ends: 394 [2022-12-14 12:03:22,406 INFO L226 Difference]: Without dead ends: 394 [2022-12-14 12:03:22,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=380, Invalid=2482, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:03:22,408 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:22,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 401 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:03:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-14 12:03:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 328. [2022-12-14 12:03:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 1.177914110429448) internal successors, (384), 327 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 384 transitions. [2022-12-14 12:03:22,417 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 384 transitions. Word has length 33 [2022-12-14 12:03:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:22,417 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 384 transitions. [2022-12-14 12:03:22,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 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) [2022-12-14 12:03:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 384 transitions. [2022-12-14 12:03:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 12:03:22,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:22,418 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:22,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 12:03:22,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 12:03:22,619 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1736511262, now seen corresponding path program 6 times [2022-12-14 12:03:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355700142] [2022-12-14 12:03:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:22,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:22,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355700142] [2022-12-14 12:03:22,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355700142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:22,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254488244] [2022-12-14 12:03:22,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:03:22,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:22,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:22,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:22,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:03:22,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:03:22,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 12:03:22,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:22,983 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:03:22,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:03:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:23,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254488244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233471520] [2022-12-14 12:03:23,437 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:03:23,437 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:23,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:23,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:23,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:23,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:23,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:23,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:23,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:23,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:23,582 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:03:23,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:03:23,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:25,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6895#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:25,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:25,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:25,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-12-14 12:03:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447082335] [2022-12-14 12:03:25,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:25,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 12:03:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 12:03:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 12:03:25,420 INFO L87 Difference]: Start difference. First operand 328 states and 384 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 37 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) [2022-12-14 12:03:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:26,008 INFO L93 Difference]: Finished difference Result 418 states and 477 transitions. [2022-12-14 12:03:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:03:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 12:03:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:26,010 INFO L225 Difference]: With dead ends: 418 [2022-12-14 12:03:26,010 INFO L226 Difference]: Without dead ends: 418 [2022-12-14 12:03:26,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=628, Invalid=3532, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 12:03:26,012 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 342 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:26,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 329 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:03:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-12-14 12:03:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 356. [2022-12-14 12:03:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 354 states have (on average 1.1807909604519775) internal successors, (418), 355 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 418 transitions. [2022-12-14 12:03:26,021 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 418 transitions. Word has length 33 [2022-12-14 12:03:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:26,021 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 418 transitions. [2022-12-14 12:03:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 37 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) [2022-12-14 12:03:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 418 transitions. [2022-12-14 12:03:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:03:26,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:26,022 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:26,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:03:26,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 12:03:26,223 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:26,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1783191838, now seen corresponding path program 7 times [2022-12-14 12:03:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333654912] [2022-12-14 12:03:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:26,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:26,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:26,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333654912] [2022-12-14 12:03:26,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333654912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:26,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24137967] [2022-12-14 12:03:26,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:03:26,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:26,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:26,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:03:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:26,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 12:03:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:26,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:26,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:03:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:26,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:26,805 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 [2022-12-14 12:03:26,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:03:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:26,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24137967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:26,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795635544] [2022-12-14 12:03:26,867 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:03:26,867 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:26,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:26,867 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:26,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:26,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:26,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:26,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:26,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:26,953 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 [2022-12-14 12:03:26,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:27,020 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:03:27,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:03:27,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:28,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7961#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:28,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:28,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:28,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 32 [2022-12-14 12:03:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819928557] [2022-12-14 12:03:28,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:28,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 12:03:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 12:03:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:03:28,852 INFO L87 Difference]: Start difference. First operand 356 states and 418 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:29,353 INFO L93 Difference]: Finished difference Result 572 states and 652 transitions. [2022-12-14 12:03:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:03:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 12:03:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:29,356 INFO L225 Difference]: With dead ends: 572 [2022-12-14 12:03:29,356 INFO L226 Difference]: Without dead ends: 475 [2022-12-14 12:03:29,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=353, Invalid=3069, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:03:29,357 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 281 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:29,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 647 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:03:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-12-14 12:03:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 440. [2022-12-14 12:03:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 438 states have (on average 1.178082191780822) internal successors, (516), 439 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 516 transitions. [2022-12-14 12:03:29,364 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 516 transitions. Word has length 37 [2022-12-14 12:03:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:29,364 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 516 transitions. [2022-12-14 12:03:29,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 516 transitions. [2022-12-14 12:03:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:03:29,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:29,364 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:29,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:03:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:29,566 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash 177923991, now seen corresponding path program 6 times [2022-12-14 12:03:29,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:29,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843831426] [2022-12-14 12:03:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:30,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:30,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843831426] [2022-12-14 12:03:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843831426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:30,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027210434] [2022-12-14 12:03:30,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:03:30,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:30,064 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:03:30,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:03:30,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:30,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 12:03:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:30,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:30,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:30,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:03:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:03:31,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:31,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:03:31,954 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-14 12:03:31,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 30 [2022-12-14 12:03:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:31,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:32,670 INFO L321 Elim1Store]: treesize reduction 55, result has 42.1 percent of original size [2022-12-14 12:03:32,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 495 treesize of output 375 [2022-12-14 12:03:32,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:03:32,680 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 363 treesize of output 337 [2022-12-14 12:03:32,746 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2022-12-14 12:03:32,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 12:03:32,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 12:03:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:33,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027210434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857023779] [2022-12-14 12:03:33,222 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:03:33,223 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:33,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:33,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:33,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:33,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:33,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:33,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:33,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:33,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:03:33,370 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 [2022-12-14 12:03:33,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:33,449 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:03:33,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:03:33,587 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:03:33,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:03:34,608 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:37,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9313#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:37,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:37,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:37,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 28] total 69 [2022-12-14 12:03:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340421894] [2022-12-14 12:03:37,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 12:03:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 12:03:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:03:37,144 INFO L87 Difference]: Start difference. First operand 440 states and 516 transitions. Second operand has 70 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 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) [2022-12-14 12:03:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:49,032 INFO L93 Difference]: Finished difference Result 886 states and 1019 transitions. [2022-12-14 12:03:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-14 12:03:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 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 39 [2022-12-14 12:03:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:49,036 INFO L225 Difference]: With dead ends: 886 [2022-12-14 12:03:49,037 INFO L226 Difference]: Without dead ends: 860 [2022-12-14 12:03:49,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7687 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=2176, Invalid=25546, Unknown=0, NotChecked=0, Total=27722 [2022-12-14 12:03:49,040 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 843 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2891 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:49,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 643 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2891 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 12:03:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-12-14 12:03:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 683. [2022-12-14 12:03:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 681 states have (on average 1.1747430249632893) internal successors, (800), 682 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 800 transitions. [2022-12-14 12:03:49,056 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 800 transitions. Word has length 39 [2022-12-14 12:03:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:49,056 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 800 transitions. [2022-12-14 12:03:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 69 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) [2022-12-14 12:03:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 800 transitions. [2022-12-14 12:03:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:03:49,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:49,057 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:49,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:03:49,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 12:03:49,259 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash 417869733, now seen corresponding path program 8 times [2022-12-14 12:03:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694189509] [2022-12-14 12:03:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:49,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694189509] [2022-12-14 12:03:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694189509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231755411] [2022-12-14 12:03:49,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:03:49,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:49,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:49,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:49,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:03:49,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 12:03:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 12:03:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:50,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:50,414 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 [2022-12-14 12:03:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231755411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136594681] [2022-12-14 12:03:50,473 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:03:50,473 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:50,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:50,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:50,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:50,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:50,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:50,531 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 [2022-12-14 12:03:50,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:50,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:50,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:50,655 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:03:50,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:03:50,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:52,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11333#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:52,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:52,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:52,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2022-12-14 12:03:52,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986441556] [2022-12-14 12:03:52,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:52,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 12:03:52,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 12:03:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 12:03:52,212 INFO L87 Difference]: Start difference. First operand 683 states and 800 transitions. Second operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:53,140 INFO L93 Difference]: Finished difference Result 832 states and 954 transitions. [2022-12-14 12:03:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 12:03:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 12:03:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:53,141 INFO L225 Difference]: With dead ends: 832 [2022-12-14 12:03:53,141 INFO L226 Difference]: Without dead ends: 832 [2022-12-14 12:03:53,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=757, Invalid=4499, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 12:03:53,142 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 327 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:53,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 482 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:03:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-12-14 12:03:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 723. [2022-12-14 12:03:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 721 states have (on average 1.1775312066574202) internal successors, (849), 722 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 849 transitions. [2022-12-14 12:03:53,151 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 849 transitions. Word has length 39 [2022-12-14 12:03:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:53,151 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 849 transitions. [2022-12-14 12:03:53,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 849 transitions. [2022-12-14 12:03:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 12:03:53,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:53,152 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:53,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 12:03:53,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 12:03:53,352 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 878103935, now seen corresponding path program 7 times [2022-12-14 12:03:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:53,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160195069] [2022-12-14 12:03:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:53,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:53,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160195069] [2022-12-14 12:03:53,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160195069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:53,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258064343] [2022-12-14 12:03:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:03:53,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:53,585 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:53,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:03:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 12:03:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:53,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:03:54,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:03:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:03:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258064343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:03:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376330305] [2022-12-14 12:03:54,074 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:03:54,074 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:03:54,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:03:54,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:03:54,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:03:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:03:54,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:03:54,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:03:54,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:54,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:03:54,189 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:03:54,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:03:54,221 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 [2022-12-14 12:03:54,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:03:54,298 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:03:54,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:03:54,423 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:03:54,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:03:55,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:03:57,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13209#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:03:57,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:03:57,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:03:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-12-14 12:03:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042934644] [2022-12-14 12:03:57,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:03:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 12:03:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:03:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 12:03:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:03:57,099 INFO L87 Difference]: Start difference. First operand 723 states and 849 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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) [2022-12-14 12:03:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:03:57,619 INFO L93 Difference]: Finished difference Result 962 states and 1118 transitions. [2022-12-14 12:03:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:03:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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) Word has length 41 [2022-12-14 12:03:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:03:57,622 INFO L225 Difference]: With dead ends: 962 [2022-12-14 12:03:57,622 INFO L226 Difference]: Without dead ends: 962 [2022-12-14 12:03:57,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=409, Invalid=2671, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:03:57,623 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 226 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:03:57,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 410 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:03:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-12-14 12:03:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 799. [2022-12-14 12:03:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 797 states have (on average 1.176913425345044) internal successors, (938), 798 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:03:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 938 transitions. [2022-12-14 12:03:57,633 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 938 transitions. Word has length 41 [2022-12-14 12:03:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:03:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 938 transitions. [2022-12-14 12:03:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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) [2022-12-14 12:03:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 938 transitions. [2022-12-14 12:03:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 12:03:57,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:03:57,634 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:03:57,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 12:03:57,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:57,834 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:03:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:03:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 100412393, now seen corresponding path program 9 times [2022-12-14 12:03:57,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:03:57,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615666972] [2022-12-14 12:03:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:03:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:03:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:03:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:58,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:03:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615666972] [2022-12-14 12:03:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615666972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:03:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966188238] [2022-12-14 12:03:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:03:58,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:03:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:03:58,147 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:03:58,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:03:58,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:03:58,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:03:58,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 12:03:58,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:03:58,360 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 [2022-12-14 12:03:59,517 INFO L321 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2022-12-14 12:03:59,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 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 [2022-12-14 12:03:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:03:59,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:00,587 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 89 treesize of output 77 [2022-12-14 12:04:00,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-12-14 12:04:00,697 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-14 12:04:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:01,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966188238] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:01,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92561648] [2022-12-14 12:04:01,150 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:04:01,150 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:01,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:01,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:01,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:01,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:01,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:04:01,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:01,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:01,274 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 [2022-12-14 12:04:01,328 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:04:01,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:04:01,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:05,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15329#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:05,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:05,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:05,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 69 [2022-12-14 12:04:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557863163] [2022-12-14 12:04:05,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 12:04:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 12:04:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=6105, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 12:04:05,125 INFO L87 Difference]: Start difference. First operand 799 states and 938 transitions. Second operand has 70 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:12,856 INFO L93 Difference]: Finished difference Result 1302 states and 1481 transitions. [2022-12-14 12:04:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 12:04:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 12:04:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:12,858 INFO L225 Difference]: With dead ends: 1302 [2022-12-14 12:04:12,858 INFO L226 Difference]: Without dead ends: 1177 [2022-12-14 12:04:12,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1964, Invalid=18916, Unknown=0, NotChecked=0, Total=20880 [2022-12-14 12:04:12,859 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 828 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 2794 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:12,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 942 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2794 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 12:04:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-12-14 12:04:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 997. [2022-12-14 12:04:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 995 states have (on average 1.1768844221105528) internal successors, (1171), 996 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1171 transitions. [2022-12-14 12:04:12,870 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1171 transitions. Word has length 43 [2022-12-14 12:04:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:12,870 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 1171 transitions. [2022-12-14 12:04:12,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6714285714285715) internal successors, (117), 69 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1171 transitions. [2022-12-14 12:04:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:04:12,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:12,871 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:12,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 12:04:13,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 12:04:13,072 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2048754846, now seen corresponding path program 1 times [2022-12-14 12:04:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:13,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087714260] [2022-12-14 12:04:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:13,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:04:14,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087714260] [2022-12-14 12:04:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087714260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495975563] [2022-12-14 12:04:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:14,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:14,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:14,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:14,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:04:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:14,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-14 12:04:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:14,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:04:14,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:14,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:04:14,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:04:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:04:14,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:14,479 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_693 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_693) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 12:04:14,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:14,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:04:14,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:14,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 12:04:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:04:14,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495975563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622601177] [2022-12-14 12:04:14,629 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:04:14,629 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:14,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:14,630 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:14,630 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:14,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:14,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:14,699 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 [2022-12-14 12:04:14,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:14,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:04:14,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:14,800 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 [2022-12-14 12:04:14,868 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:04:14,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:04:14,987 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:04:14,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:04:16,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:18,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18064#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:18,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:18,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:18,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 33 [2022-12-14 12:04:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995963920] [2022-12-14 12:04:18,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:18,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 12:04:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 12:04:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1936, Unknown=1, NotChecked=88, Total=2162 [2022-12-14 12:04:18,497 INFO L87 Difference]: Start difference. First operand 997 states and 1171 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-12-14 12:04:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:22,604 INFO L93 Difference]: Finished difference Result 1151 states and 1324 transitions. [2022-12-14 12:04:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 12:04:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) Word has length 45 [2022-12-14 12:04:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:22,606 INFO L225 Difference]: With dead ends: 1151 [2022-12-14 12:04:22,606 INFO L226 Difference]: Without dead ends: 887 [2022-12-14 12:04:22,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=667, Invalid=6817, Unknown=2, NotChecked=170, Total=7656 [2022-12-14 12:04:22,607 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 493 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 9 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:22,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 836 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1651 Invalid, 24 Unknown, 138 Unchecked, 0.9s Time] [2022-12-14 12:04:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-12-14 12:04:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 711. [2022-12-14 12:04:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 709 states have (on average 1.1805359661495063) internal successors, (837), 710 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 837 transitions. [2022-12-14 12:04:22,620 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 837 transitions. Word has length 45 [2022-12-14 12:04:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:22,620 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 837 transitions. [2022-12-14 12:04:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2022-12-14 12:04:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 837 transitions. [2022-12-14 12:04:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:04:22,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:22,622 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:22,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 12:04:22,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 12:04:22,823 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash 994498156, now seen corresponding path program 10 times [2022-12-14 12:04:22,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:22,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698371531] [2022-12-14 12:04:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:22,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:23,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698371531] [2022-12-14 12:04:23,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698371531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557869820] [2022-12-14 12:04:23,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:04:23,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:23,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:23,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 12:04:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 12:04:23,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:23,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:23,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:04:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557869820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075956784] [2022-12-14 12:04:23,681 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:04:23,682 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:23,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:23,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:23,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:23,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:23,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:23,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:23,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:23,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:23,823 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:04:23,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:04:23,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:25,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20325#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:25,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:25,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:25,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 39 [2022-12-14 12:04:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561874436] [2022-12-14 12:04:25,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:25,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 12:04:25,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 12:04:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:04:25,991 INFO L87 Difference]: Start difference. First operand 711 states and 837 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 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) [2022-12-14 12:04:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:26,821 INFO L93 Difference]: Finished difference Result 863 states and 992 transitions. [2022-12-14 12:04:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 12:04:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 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 45 [2022-12-14 12:04:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:26,825 INFO L225 Difference]: With dead ends: 863 [2022-12-14 12:04:26,825 INFO L226 Difference]: Without dead ends: 863 [2022-12-14 12:04:26,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=792, Invalid=4610, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:04:26,826 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 321 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:26,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 603 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:04:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-12-14 12:04:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 747. [2022-12-14 12:04:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 745 states have (on average 1.1825503355704698) internal successors, (881), 746 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 881 transitions. [2022-12-14 12:04:26,833 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 881 transitions. Word has length 45 [2022-12-14 12:04:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:26,833 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 881 transitions. [2022-12-14 12:04:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 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) [2022-12-14 12:04:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 881 transitions. [2022-12-14 12:04:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:04:26,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:26,834 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:26,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 12:04:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 12:04:27,035 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1792538951, now seen corresponding path program 8 times [2022-12-14 12:04:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612159597] [2022-12-14 12:04:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:27,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:27,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612159597] [2022-12-14 12:04:27,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612159597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:27,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526802406] [2022-12-14 12:04:27,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:04:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:27,647 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 12:04:27,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 12:04:27,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:04:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 12:04:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:27,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:04:27,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:04:28,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:04:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:28,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:28,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:28,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:04:28,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:28,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 12:04:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:28,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526802406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687844547] [2022-12-14 12:04:28,513 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:04:28,513 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:28,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:28,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:28,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:28,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:28,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:04:28,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:28,753 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:04:28,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:04:28,869 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:04:28,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:04:29,937 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:32,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22309#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:32,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:32,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:32,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 41 [2022-12-14 12:04:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629493580] [2022-12-14 12:04:32,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 12:04:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 12:04:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2796, Unknown=9, NotChecked=0, Total=2970 [2022-12-14 12:04:32,184 INFO L87 Difference]: Start difference. First operand 747 states and 881 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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) [2022-12-14 12:04:33,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:33,512 INFO L93 Difference]: Finished difference Result 1491 states and 1718 transitions. [2022-12-14 12:04:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 12:04:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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) Word has length 47 [2022-12-14 12:04:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:33,517 INFO L225 Difference]: With dead ends: 1491 [2022-12-14 12:04:33,518 INFO L226 Difference]: Without dead ends: 1127 [2022-12-14 12:04:33,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=591, Invalid=6882, Unknown=9, NotChecked=0, Total=7482 [2022-12-14 12:04:33,518 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 556 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:33,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1110 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:04:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-12-14 12:04:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 796. [2022-12-14 12:04:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 794 states have (on average 1.1838790931989924) internal successors, (940), 795 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 940 transitions. [2022-12-14 12:04:33,527 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 940 transitions. Word has length 47 [2022-12-14 12:04:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:33,527 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 940 transitions. [2022-12-14 12:04:33,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 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) [2022-12-14 12:04:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 940 transitions. [2022-12-14 12:04:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:04:33,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:33,528 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:33,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 12:04:33,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:33,728 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1055094575, now seen corresponding path program 9 times [2022-12-14 12:04:33,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266241194] [2022-12-14 12:04:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:34,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:34,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266241194] [2022-12-14 12:04:34,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266241194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:34,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043577717] [2022-12-14 12:04:34,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:04:34,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:34,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:34,045 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:34,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:04:34,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:04:34,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:04:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 12:04:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:34,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:34,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:04:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:34,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043577717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670704266] [2022-12-14 12:04:34,551 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:04:34,551 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:34,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:34,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:34,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:34,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:34,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:34,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:34,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:04:34,669 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:04:34,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:04:34,703 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 [2022-12-14 12:04:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:34,785 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:04:34,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:04:34,897 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:04:34,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:04:35,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:37,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24996#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:37,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:37,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2022-12-14 12:04:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102522110] [2022-12-14 12:04:37,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:04:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:37,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:04:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 12:04:37,724 INFO L87 Difference]: Start difference. First operand 796 states and 940 transitions. Second operand has 35 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:38,266 INFO L93 Difference]: Finished difference Result 1228 states and 1432 transitions. [2022-12-14 12:04:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:04:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 12:04:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:38,268 INFO L225 Difference]: With dead ends: 1228 [2022-12-14 12:04:38,268 INFO L226 Difference]: Without dead ends: 1228 [2022-12-14 12:04:38,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:04:38,269 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 356 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:38,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 601 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:04:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-12-14 12:04:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 898. [2022-12-14 12:04:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.1830357142857142) internal successors, (1060), 897 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1060 transitions. [2022-12-14 12:04:38,279 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1060 transitions. Word has length 49 [2022-12-14 12:04:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:38,279 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1060 transitions. [2022-12-14 12:04:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.0) internal successors, (102), 34 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1060 transitions. [2022-12-14 12:04:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:04:38,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:38,281 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:38,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:04:38,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 12:04:38,482 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -141813968, now seen corresponding path program 11 times [2022-12-14 12:04:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586548454] [2022-12-14 12:04:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:38,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:38,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:38,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586548454] [2022-12-14 12:04:38,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586548454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:38,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768004352] [2022-12-14 12:04:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:04:38,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:38,919 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:38,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 12:04:39,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 12:04:39,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:04:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 12:04:39,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:39,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:04:39,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:39,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:04:40,445 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:04:40,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-12-14 12:04:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:40,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:42,567 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 6)) 0)) is different from false [2022-12-14 12:04:42,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:42,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-14 12:04:42,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:42,578 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 27 treesize of output 31 [2022-12-14 12:04:42,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:04:42,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:42,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-14 12:04:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:43,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768004352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406371736] [2022-12-14 12:04:43,015 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:04:43,015 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:43,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:43,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:43,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:43,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:43,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:43,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:43,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:43,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:43,175 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:04:43,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:04:43,296 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:45,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27507#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:45,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:45,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:45,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 56 [2022-12-14 12:04:45,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569384422] [2022-12-14 12:04:45,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 12:04:45,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:45,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 12:04:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4202, Unknown=1, NotChecked=130, Total=4556 [2022-12-14 12:04:45,603 INFO L87 Difference]: Start difference. First operand 898 states and 1060 transitions. Second operand has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:49,307 INFO L93 Difference]: Finished difference Result 1428 states and 1639 transitions. [2022-12-14 12:04:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 12:04:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 12:04:49,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:49,309 INFO L225 Difference]: With dead ends: 1428 [2022-12-14 12:04:49,309 INFO L226 Difference]: Without dead ends: 1180 [2022-12-14 12:04:49,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=932, Invalid=12181, Unknown=1, NotChecked=226, Total=13340 [2022-12-14 12:04:49,310 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 621 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:49,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 2067 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2534 Invalid, 0 Unknown, 108 Unchecked, 1.3s Time] [2022-12-14 12:04:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-12-14 12:04:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1070. [2022-12-14 12:04:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1068 states have (on average 1.1835205992509363) internal successors, (1264), 1069 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1264 transitions. [2022-12-14 12:04:49,319 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1264 transitions. Word has length 49 [2022-12-14 12:04:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:49,319 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1264 transitions. [2022-12-14 12:04:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1264 transitions. [2022-12-14 12:04:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 12:04:49,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:49,320 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:49,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 12:04:49,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 12:04:49,521 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2105568397, now seen corresponding path program 12 times [2022-12-14 12:04:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:49,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333069450] [2022-12-14 12:04:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:49,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:50,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333069450] [2022-12-14 12:04:50,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333069450] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:50,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398991897] [2022-12-14 12:04:50,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:04:50,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:50,037 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:50,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 12:04:50,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:04:50,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:04:50,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 12:04:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:50,155 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:04:50,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:04:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:50,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:04:51,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398991897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840540459] [2022-12-14 12:04:51,065 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:04:51,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:51,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:51,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:51,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:51,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:51,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:51,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:51,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:51,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:51,221 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:04:51,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:04:51,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:04:53,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30467#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:04:53,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:04:53,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:04:53,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2022-12-14 12:04:53,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987824107] [2022-12-14 12:04:53,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:04:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 12:04:53,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:04:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 12:04:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=3655, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 12:04:53,041 INFO L87 Difference]: Start difference. First operand 1070 states and 1264 transitions. Second operand has 52 states, 51 states have (on average 2.4313725490196076) internal successors, (124), 52 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:04:54,216 INFO L93 Difference]: Finished difference Result 1278 states and 1476 transitions. [2022-12-14 12:04:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 12:04:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.4313725490196076) internal successors, (124), 52 states have internal predecessors, (124), 0 states have call successors, (0), 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 51 [2022-12-14 12:04:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:04:54,218 INFO L225 Difference]: With dead ends: 1278 [2022-12-14 12:04:54,218 INFO L226 Difference]: Without dead ends: 1278 [2022-12-14 12:04:54,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1238, Invalid=6594, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 12:04:54,219 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 541 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:04:54,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 741 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:04:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-12-14 12:04:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1114. [2022-12-14 12:04:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1112 states have (on average 1.185251798561151) internal successors, (1318), 1113 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1318 transitions. [2022-12-14 12:04:54,229 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1318 transitions. Word has length 51 [2022-12-14 12:04:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:04:54,229 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1318 transitions. [2022-12-14 12:04:54,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.4313725490196076) internal successors, (124), 52 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:04:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1318 transitions. [2022-12-14 12:04:54,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:04:54,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:04:54,230 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:04:54,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 12:04:54,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 12:04:54,431 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:04:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:04:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1211457801, now seen corresponding path program 10 times [2022-12-14 12:04:54,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:04:54,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17504607] [2022-12-14 12:04:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:04:54,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:04:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:55,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:04:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17504607] [2022-12-14 12:04:55,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17504607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:04:55,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349399032] [2022-12-14 12:04:55,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:04:55,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:04:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:04:55,138 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:04:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 12:04:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:04:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-14 12:04:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:04:55,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:04:55,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:55,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:04:56,709 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-14 12:04:56,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-12-14 12:04:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:56,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:04:57,239 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_962 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_962) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_962 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= 0 .cse1) (not (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1))))) is different from false [2022-12-14 12:04:57,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:57,244 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-12-14 12:04:57,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:57,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2022-12-14 12:04:57,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:04:57,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-12-14 12:04:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:04:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349399032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:04:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39545975] [2022-12-14 12:04:57,767 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:04:57,767 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:04:57,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:04:57,767 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:04:57,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:04:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:04:57,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:04:57,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:57,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:57,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:57,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:04:57,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:57,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:04:57,994 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:04:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:04:58,116 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:04:58,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:04:59,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:01,995 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33313#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:01,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:01,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:01,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2022-12-14 12:05:01,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375211612] [2022-12-14 12:05:01,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:01,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 12:05:01,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 12:05:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6022, Unknown=1, NotChecked=156, Total=6480 [2022-12-14 12:05:01,997 INFO L87 Difference]: Start difference. First operand 1114 states and 1318 transitions. Second operand has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:17,736 WARN L233 SmtUtils]: Spent 12.15s on a formula simplification. DAG size of input: 40 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:05:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:23,157 INFO L93 Difference]: Finished difference Result 2702 states and 3172 transitions. [2022-12-14 12:05:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 12:05:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 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 55 [2022-12-14 12:05:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:23,164 INFO L225 Difference]: With dead ends: 2702 [2022-12-14 12:05:23,164 INFO L226 Difference]: Without dead ends: 2664 [2022-12-14 12:05:23,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5511 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1578, Invalid=21987, Unknown=1, NotChecked=304, Total=23870 [2022-12-14 12:05:23,166 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1131 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:23,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 1820 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3703 Invalid, 0 Unknown, 180 Unchecked, 1.8s Time] [2022-12-14 12:05:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-12-14 12:05:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2153. [2022-12-14 12:05:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2151 states have (on average 1.1868898186889818) internal successors, (2553), 2152 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 2553 transitions. [2022-12-14 12:05:23,197 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 2553 transitions. Word has length 55 [2022-12-14 12:05:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:23,197 INFO L495 AbstractCegarLoop]: Abstraction has 2153 states and 2553 transitions. [2022-12-14 12:05:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1911764705882355) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 2553 transitions. [2022-12-14 12:05:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:05:23,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:23,200 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:23,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 12:05:23,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:23,401 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:05:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1249966263, now seen corresponding path program 13 times [2022-12-14 12:05:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135472719] [2022-12-14 12:05:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:23,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:23,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135472719] [2022-12-14 12:05:23,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135472719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:05:23,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006844206] [2022-12-14 12:05:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:05:23,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:05:23,964 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:05:23,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 12:05:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 12:05:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:05:24,228 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 [2022-12-14 12:05:24,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:05:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:24,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:05:24,445 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 [2022-12-14 12:05:24,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:05:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:24,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006844206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:05:24,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059531520] [2022-12-14 12:05:24,562 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:05:24,562 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:05:24,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:05:24,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:05:24,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:05:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:05:24,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:05:24,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:05:24,636 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 [2022-12-14 12:05:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:24,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:24,719 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:05:24,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:05:24,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:26,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38695#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:26,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:26,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:26,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 41 [2022-12-14 12:05:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855379401] [2022-12-14 12:05:26,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 12:05:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 12:05:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 12:05:26,978 INFO L87 Difference]: Start difference. First operand 2153 states and 2553 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:28,346 INFO L93 Difference]: Finished difference Result 3031 states and 3544 transitions. [2022-12-14 12:05:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 12:05:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 12:05:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:28,350 INFO L225 Difference]: With dead ends: 3031 [2022-12-14 12:05:28,351 INFO L226 Difference]: Without dead ends: 2761 [2022-12-14 12:05:28,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=446, Invalid=4956, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:05:28,351 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 361 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:28,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1806 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:05:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2022-12-14 12:05:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2585. [2022-12-14 12:05:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2583 states have (on average 1.1885404568331397) internal successors, (3070), 2584 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3070 transitions. [2022-12-14 12:05:28,372 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3070 transitions. Word has length 55 [2022-12-14 12:05:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:28,372 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3070 transitions. [2022-12-14 12:05:28,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3070 transitions. [2022-12-14 12:05:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 12:05:28,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:28,373 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:28,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 12:05:28,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 12:05:28,574 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:05:28,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash 420328671, now seen corresponding path program 11 times [2022-12-14 12:05:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:28,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437389348] [2022-12-14 12:05:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:28,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:05:28,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437389348] [2022-12-14 12:05:28,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437389348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:05:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599835163] [2022-12-14 12:05:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:05:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:05:28,993 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:05:28,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 12:05:29,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 12:05:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:05:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 12:05:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:05:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:05:29,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:05:29,752 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 [2022-12-14 12:05:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:05:29,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599835163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:05:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13003665] [2022-12-14 12:05:29,853 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:05:29,853 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:05:29,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:05:29,854 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:05:29,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:05:29,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:05:29,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:05:29,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:29,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:29,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:05:29,993 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:05:29,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:05:30,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:30,062 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 [2022-12-14 12:05:30,138 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:05:30,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:05:30,293 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:05:30,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:05:31,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:33,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44747#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:33,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:33,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-12-14 12:05:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919298028] [2022-12-14 12:05:33,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 12:05:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 12:05:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:05:33,449 INFO L87 Difference]: Start difference. First operand 2585 states and 3070 transitions. Second operand has 46 states, 45 states have (on average 3.422222222222222) internal successors, (154), 45 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:34,275 INFO L93 Difference]: Finished difference Result 3276 states and 3873 transitions. [2022-12-14 12:05:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:05:34,275 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.422222222222222) internal successors, (154), 45 states have internal predecessors, (154), 0 states have call successors, (0), 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 57 [2022-12-14 12:05:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:34,280 INFO L225 Difference]: With dead ends: 3276 [2022-12-14 12:05:34,280 INFO L226 Difference]: Without dead ends: 3276 [2022-12-14 12:05:34,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=800, Invalid=4750, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 12:05:34,280 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 402 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:34,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 609 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:05:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2022-12-14 12:05:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2747. [2022-12-14 12:05:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2745 states have (on average 1.1883424408014571) internal successors, (3262), 2746 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3262 transitions. [2022-12-14 12:05:34,309 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3262 transitions. Word has length 57 [2022-12-14 12:05:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:34,309 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 3262 transitions. [2022-12-14 12:05:34,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.422222222222222) internal successors, (154), 45 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3262 transitions. [2022-12-14 12:05:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 12:05:34,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:34,310 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:34,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 12:05:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 12:05:34,511 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:05:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -265750854, now seen corresponding path program 14 times [2022-12-14 12:05:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108636364] [2022-12-14 12:05:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:34,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:35,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108636364] [2022-12-14 12:05:35,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108636364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:05:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069780222] [2022-12-14 12:05:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:05:35,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:05:35,055 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:05:35,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 12:05:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 12:05:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:05:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:05:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:05:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:35,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:05:36,143 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 [2022-12-14 12:05:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:36,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069780222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:05:36,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626453723] [2022-12-14 12:05:36,286 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:05:36,286 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:05:36,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:05:36,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:05:36,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:05:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:05:36,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:05:36,352 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 [2022-12-14 12:05:36,387 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 14 treesize of output 10 [2022-12-14 12:05:36,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:36,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:36,464 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:05:36,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:05:36,603 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:38,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51208#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:38,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:38,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:38,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2022-12-14 12:05:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664172167] [2022-12-14 12:05:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 12:05:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 12:05:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=4199, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 12:05:38,645 INFO L87 Difference]: Start difference. First operand 2747 states and 3262 transitions. Second operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 57 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:40,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:40,151 INFO L93 Difference]: Finished difference Result 3145 states and 3680 transitions. [2022-12-14 12:05:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:05:40,151 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 57 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 12:05:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:40,156 INFO L225 Difference]: With dead ends: 3145 [2022-12-14 12:05:40,156 INFO L226 Difference]: Without dead ends: 3145 [2022-12-14 12:05:40,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1434, Invalid=7878, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 12:05:40,156 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 480 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:40,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 874 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:05:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-12-14 12:05:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2823. [2022-12-14 12:05:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2821 states have (on average 1.1896490606168026) internal successors, (3356), 2822 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 3356 transitions. [2022-12-14 12:05:40,184 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 3356 transitions. Word has length 57 [2022-12-14 12:05:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:40,184 INFO L495 AbstractCegarLoop]: Abstraction has 2823 states and 3356 transitions. [2022-12-14 12:05:40,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 57 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 3356 transitions. [2022-12-14 12:05:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:05:40,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:40,185 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:40,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 12:05:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:40,386 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:05:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash -994292866, now seen corresponding path program 2 times [2022-12-14 12:05:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:40,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632936753] [2022-12-14 12:05:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 12 proven. 136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:05:40,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632936753] [2022-12-14 12:05:40,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632936753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:05:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400364743] [2022-12-14 12:05:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:05:40,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:40,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:05:40,977 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:05:40,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:05:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 12:05:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:05:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 12:05:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:05:41,162 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 18 treesize of output 16 [2022-12-14 12:05:41,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:41,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:05:41,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:05:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 13 proven. 135 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:05:41,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:05:41,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:05:41,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:05:41,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:05:41,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 12:05:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 12 proven. 136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:05:41,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400364743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:05:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390171436] [2022-12-14 12:05:41,833 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:05:41,833 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:05:41,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:05:41,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:05:41,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:05:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:05:41,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:05:41,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:05:41,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:41,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:05:41,962 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:05:41,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:05:41,995 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 [2022-12-14 12:05:42,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:42,075 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:05:42,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:05:42,217 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:05:42,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:05:43,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:45,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57640#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:45,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:45,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:45,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 35 [2022-12-14 12:05:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238026551] [2022-12-14 12:05:45,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:45,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:05:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:05:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2192, Unknown=6, NotChecked=0, Total=2352 [2022-12-14 12:05:45,139 INFO L87 Difference]: Start difference. First operand 2823 states and 3356 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:05:46,292 INFO L93 Difference]: Finished difference Result 3179 states and 3702 transitions. [2022-12-14 12:05:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 12:05:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 12:05:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:05:46,295 INFO L225 Difference]: With dead ends: 3179 [2022-12-14 12:05:46,295 INFO L226 Difference]: Without dead ends: 2247 [2022-12-14 12:05:46,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=456, Invalid=5238, Unknown=6, NotChecked=0, Total=5700 [2022-12-14 12:05:46,295 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 401 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:05:46,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 1345 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:05:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-12-14 12:05:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1581. [2022-12-14 12:05:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1579 states have (on average 1.1880937302089931) internal successors, (1876), 1580 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 1876 transitions. [2022-12-14 12:05:46,309 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 1876 transitions. Word has length 61 [2022-12-14 12:05:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:05:46,309 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 1876 transitions. [2022-12-14 12:05:46,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:05:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 1876 transitions. [2022-12-14 12:05:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:05:46,310 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:05:46,310 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:05:46,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-14 12:05:46,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:46,510 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:05:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:05:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash 849961086, now seen corresponding path program 15 times [2022-12-14 12:05:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:05:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526158560] [2022-12-14 12:05:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:05:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:05:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:05:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:47,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:05:47,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526158560] [2022-12-14 12:05:47,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526158560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:05:47,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624066503] [2022-12-14 12:05:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:05:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:05:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:05:47,082 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:05:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 12:05:47,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:05:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:05:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-14 12:05:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:05:47,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:48,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:05:48,393 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 75 treesize of output 31 [2022-12-14 12:05:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:48,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:05:49,696 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 106 treesize of output 92 [2022-12-14 12:05:49,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:05:49,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 106 treesize of output 78 [2022-12-14 12:05:49,958 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-14 12:05:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 110 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:05:50,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624066503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:05:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746650736] [2022-12-14 12:05:50,302 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:05:50,302 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:05:50,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:05:50,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:05:50,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:05:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:05:50,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:05:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:05:50,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:50,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:05:50,417 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 [2022-12-14 12:05:50,450 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:05:50,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:05:50,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:05:53,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62918#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:05:53,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:05:53,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:05:53,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 37, 37] total 91 [2022-12-14 12:05:53,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391581812] [2022-12-14 12:05:53,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:05:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 12:05:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:05:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 12:05:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=9725, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 12:05:53,788 INFO L87 Difference]: Start difference. First operand 1581 states and 1876 transitions. Second operand has 91 states, 91 states have (on average 1.8131868131868132) internal successors, (165), 91 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:06:06,238 INFO L93 Difference]: Finished difference Result 2607 states and 2985 transitions. [2022-12-14 12:06:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-12-14 12:06:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.8131868131868132) internal successors, (165), 91 states have internal predecessors, (165), 0 states have call successors, (0), 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 61 [2022-12-14 12:06:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:06:06,242 INFO L225 Difference]: With dead ends: 2607 [2022-12-14 12:06:06,242 INFO L226 Difference]: Without dead ends: 2272 [2022-12-14 12:06:06,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12753 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=3218, Invalid=42364, Unknown=0, NotChecked=0, Total=45582 [2022-12-14 12:06:06,244 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 1294 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 4484 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:06:06,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 3311 Invalid, 4492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4484 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 12:06:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-12-14 12:06:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1837. [2022-12-14 12:06:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1835 states have (on average 1.1896457765667574) internal successors, (2183), 1836 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2183 transitions. [2022-12-14 12:06:06,259 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2183 transitions. Word has length 61 [2022-12-14 12:06:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:06,259 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 2183 transitions. [2022-12-14 12:06:06,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.8131868131868132) internal successors, (165), 91 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2183 transitions. [2022-12-14 12:06:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:06:06,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:06,260 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:06,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 12:06:06,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-14 12:06:06,461 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:06:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 81516711, now seen corresponding path program 12 times [2022-12-14 12:06:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:06,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80881759] [2022-12-14 12:06:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:06,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:06:07,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80881759] [2022-12-14 12:06:07,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80881759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467102982] [2022-12-14 12:06:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:06:07,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:07,291 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:07,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 12:06:07,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:06:07,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:06:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 155 conjunts are in the unsatisfiable core [2022-12-14 12:06:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:07,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:08,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 12:06:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:10,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:06:10,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:06:10,304 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 12:06:10,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 27 [2022-12-14 12:06:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 14 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:10,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:11,021 INFO L321 Elim1Store]: treesize reduction 38, result has 45.7 percent of original size [2022-12-14 12:06:11,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 329 treesize of output 249 [2022-12-14 12:06:11,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:06:11,031 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 241 treesize of output 225 [2022-12-14 12:06:11,072 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-12-14 12:06:11,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 12:06:11,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 12:06:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 26 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:11,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467102982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:11,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31199331] [2022-12-14 12:06:11,793 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:06:11,793 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:11,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:11,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:11,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:06:11,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:11,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:06:11,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:11,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:11,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:06:11,969 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:06:11,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:06:12,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:12,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:12,088 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:06:12,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:06:12,205 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:06:12,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:06:13,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:06:16,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68050#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:06:16,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:06:16,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:06:16,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33, 33] total 81 [2022-12-14 12:06:16,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78900323] [2022-12-14 12:06:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:06:16,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 12:06:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:06:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 12:06:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=8561, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 12:06:16,629 INFO L87 Difference]: Start difference. First operand 1837 states and 2183 transitions. Second operand has 82 states, 82 states have (on average 1.8902439024390243) internal successors, (155), 81 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:06:28,741 INFO L93 Difference]: Finished difference Result 3948 states and 4667 transitions. [2022-12-14 12:06:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-14 12:06:28,741 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.8902439024390243) internal successors, (155), 81 states have internal predecessors, (155), 0 states have call successors, (0), 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 63 [2022-12-14 12:06:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:06:28,745 INFO L225 Difference]: With dead ends: 3948 [2022-12-14 12:06:28,745 INFO L226 Difference]: Without dead ends: 3904 [2022-12-14 12:06:28,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8132 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2010, Invalid=31662, Unknown=0, NotChecked=0, Total=33672 [2022-12-14 12:06:28,746 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1410 mSDsluCounter, 2632 mSDsCounter, 0 mSdLazyCounter, 5385 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 5413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:06:28,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 2708 Invalid, 5413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5385 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 12:06:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-12-14 12:06:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3086. [2022-12-14 12:06:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3084 states have (on average 1.1896887159533074) internal successors, (3669), 3085 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 3669 transitions. [2022-12-14 12:06:28,787 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 3669 transitions. Word has length 63 [2022-12-14 12:06:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:28,787 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 3669 transitions. [2022-12-14 12:06:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.8902439024390243) internal successors, (155), 81 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 3669 transitions. [2022-12-14 12:06:28,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:06:28,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:28,790 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:28,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 12:06:28,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 12:06:28,991 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:06:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash -863137727, now seen corresponding path program 16 times [2022-12-14 12:06:28,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:28,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871121188] [2022-12-14 12:06:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 49 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:29,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871121188] [2022-12-14 12:06:29,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871121188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130623981] [2022-12-14 12:06:29,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:06:29,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:29,757 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:29,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 12:06:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 99 conjunts are in the unsatisfiable core [2022-12-14 12:06:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:30,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:30,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:06:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 64 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:30,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130623981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:30,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007139742] [2022-12-14 12:06:30,791 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:06:30,791 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:30,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:30,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:30,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:06:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:30,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:06:30,844 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 [2022-12-14 12:06:30,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:30,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:30,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:30,945 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:06:30,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:06:31,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:06:32,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75699#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:06:32,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:06:32,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:06:32,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 51 [2022-12-14 12:06:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16132393] [2022-12-14 12:06:32,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:06:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 12:06:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:06:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 12:06:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3677, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 12:06:32,808 INFO L87 Difference]: Start difference. First operand 3086 states and 3669 transitions. Second operand has 52 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:06:35,018 INFO L93 Difference]: Finished difference Result 3522 states and 4115 transitions. [2022-12-14 12:06:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 12:06:35,018 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 12:06:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:06:35,021 INFO L225 Difference]: With dead ends: 3522 [2022-12-14 12:06:35,022 INFO L226 Difference]: Without dead ends: 3522 [2022-12-14 12:06:35,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 139 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1354, Invalid=7576, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 12:06:35,022 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 469 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:06:35,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1169 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:06:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2022-12-14 12:06:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3162. [2022-12-14 12:06:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3160 states have (on average 1.1908227848101265) internal successors, (3763), 3161 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 3763 transitions. [2022-12-14 12:06:35,047 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 3763 transitions. Word has length 63 [2022-12-14 12:06:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:35,047 INFO L495 AbstractCegarLoop]: Abstraction has 3162 states and 3763 transitions. [2022-12-14 12:06:35,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.5686274509803924) internal successors, (131), 52 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 3763 transitions. [2022-12-14 12:06:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:06:35,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:35,049 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:35,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 12:06:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:35,249 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:06:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1849591439, now seen corresponding path program 13 times [2022-12-14 12:06:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189963077] [2022-12-14 12:06:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 25 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:06:35,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189963077] [2022-12-14 12:06:35,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189963077] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60680318] [2022-12-14 12:06:35,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:06:35,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:35,741 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 12:06:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 12:06:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:06:36,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:36,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:06:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:06:36,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60680318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:36,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452699465] [2022-12-14 12:06:36,720 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:06:36,720 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:36,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:36,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:36,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:06:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:36,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:06:36,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:36,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:36,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:36,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:06:36,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:36,886 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 [2022-12-14 12:06:36,953 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:06:36,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:06:37,090 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:06:37,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:06:38,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:06:40,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82884#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:06:40,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:06:40,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:06:40,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 41 [2022-12-14 12:06:40,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606641086] [2022-12-14 12:06:40,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:06:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 12:06:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:06:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 12:06:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2814, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:06:40,367 INFO L87 Difference]: Start difference. First operand 3162 states and 3763 transitions. Second operand has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 42 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:06:41,292 INFO L93 Difference]: Finished difference Result 4239 states and 5026 transitions. [2022-12-14 12:06:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 12:06:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 42 states have internal predecessors, (134), 0 states have call successors, (0), 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 65 [2022-12-14 12:06:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:06:41,296 INFO L225 Difference]: With dead ends: 4239 [2022-12-14 12:06:41,297 INFO L226 Difference]: Without dead ends: 4239 [2022-12-14 12:06:41,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=757, Invalid=4645, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:06:41,297 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 583 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:06:41,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 820 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:06:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-12-14 12:06:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3366. [2022-12-14 12:06:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3364 states have (on average 1.190844233055886) internal successors, (4006), 3365 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4006 transitions. [2022-12-14 12:06:41,336 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4006 transitions. Word has length 65 [2022-12-14 12:06:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:41,336 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4006 transitions. [2022-12-14 12:06:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.1904761904761907) internal successors, (134), 42 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4006 transitions. [2022-12-14 12:06:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 12:06:41,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:41,338 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:41,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 12:06:41,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 12:06:41,539 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:06:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1333272955, now seen corresponding path program 17 times [2022-12-14 12:06:41,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:41,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790928111] [2022-12-14 12:06:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:41,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:42,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790928111] [2022-12-14 12:06:42,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790928111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:42,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509158151] [2022-12-14 12:06:42,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:06:42,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:42,169 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:42,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 12:06:42,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 12:06:42,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:06:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 12:06:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:42,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:42,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:06:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:42,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:42,865 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 [2022-12-14 12:06:42,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:06:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:06:42,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509158151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:42,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987290557] [2022-12-14 12:06:42,977 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:06:42,977 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:42,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:42,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:42,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:06:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:42,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:06:43,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:43,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:43,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:43,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:43,167 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:06:43,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:06:43,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:06:45,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90981#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:06:45,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:06:45,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:06:45,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 47 [2022-12-14 12:06:45,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982113066] [2022-12-14 12:06:45,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:06:45,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 12:06:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:06:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 12:06:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3227, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 12:06:45,306 INFO L87 Difference]: Start difference. First operand 3366 states and 4006 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 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) [2022-12-14 12:06:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:06:47,080 INFO L93 Difference]: Finished difference Result 4565 states and 5356 transitions. [2022-12-14 12:06:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 12:06:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 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 67 [2022-12-14 12:06:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:06:47,084 INFO L225 Difference]: With dead ends: 4565 [2022-12-14 12:06:47,084 INFO L226 Difference]: Without dead ends: 4175 [2022-12-14 12:06:47,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=508, Invalid=6464, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 12:06:47,084 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 557 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:06:47,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 2972 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 12:06:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-12-14 12:06:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3926. [2022-12-14 12:06:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3924 states have (on average 1.1929153924566769) internal successors, (4681), 3925 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:06:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 4681 transitions. [2022-12-14 12:06:47,112 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 4681 transitions. Word has length 67 [2022-12-14 12:06:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:06:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 4681 transitions. [2022-12-14 12:06:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 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) [2022-12-14 12:06:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 4681 transitions. [2022-12-14 12:06:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 12:06:47,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:06:47,114 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:06:47,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 12:06:47,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 12:06:47,315 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:06:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:06:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1164039406, now seen corresponding path program 3 times [2022-12-14 12:06:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:06:47,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023012565] [2022-12-14 12:06:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:06:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:06:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:06:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 14 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:06:47,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:06:47,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023012565] [2022-12-14 12:06:47,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023012565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:06:47,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742005826] [2022-12-14 12:06:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:06:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:06:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:06:47,928 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:06:47,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 12:06:48,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:06:48,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:06:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-14 12:06:48,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:06:48,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:48,490 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:06:48,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 12:06:48,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:06:50,659 INFO L321 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2022-12-14 12:06:50,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 76 [2022-12-14 12:06:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 14 proven. 193 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:06:50,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:06:52,464 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_1471 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse1 (select v_ArrVal_1471 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse0 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (or (= .cse0 .cse1) (= .cse0 0) (not (= .cse1 (select .cse2 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) (not (= .cse0 (select v_ArrVal_1471 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))))))) is different from false [2022-12-14 12:06:52,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:06:52,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 70 [2022-12-14 12:06:52,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:06:52,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 119 [2022-12-14 12:06:52,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:06:52,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 97 [2022-12-14 12:06:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:06:53,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742005826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:06:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423661919] [2022-12-14 12:06:53,487 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:06:53,487 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:06:53,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:06:53,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:06:53,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:06:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:06:53,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:06:53,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:53,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:53,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:53,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:06:53,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:06:53,659 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 [2022-12-14 12:06:53,734 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:06:53,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:06:53,873 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:06:53,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:06:55,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:06:58,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '100023#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:06:58,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:06:58,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:06:58,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 30] total 80 [2022-12-14 12:06:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014277845] [2022-12-14 12:06:58,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:06:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-14 12:06:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:06:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-14 12:06:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=8267, Unknown=1, NotChecked=182, Total=8742 [2022-12-14 12:06:58,521 INFO L87 Difference]: Start difference. First operand 3926 states and 4681 transitions. Second operand has 81 states, 81 states have (on average 2.419753086419753) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:08,701 INFO L93 Difference]: Finished difference Result 5811 states and 6845 transitions. [2022-12-14 12:07:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 12:07:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.419753086419753) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 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 69 [2022-12-14 12:07:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:08,704 INFO L225 Difference]: With dead ends: 5811 [2022-12-14 12:07:08,704 INFO L226 Difference]: Without dead ends: 3611 [2022-12-14 12:07:08,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5004 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1539, Invalid=27194, Unknown=1, NotChecked=336, Total=29070 [2022-12-14 12:07:08,705 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 902 mSDsluCounter, 3423 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 3515 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:08,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 3515 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 6540 Invalid, 0 Unknown, 190 Unchecked, 2.9s Time] [2022-12-14 12:07:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2022-12-14 12:07:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2484. [2022-12-14 12:07:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2482 states have (on average 1.1925866236905722) internal successors, (2960), 2483 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 2960 transitions. [2022-12-14 12:07:08,727 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 2960 transitions. Word has length 69 [2022-12-14 12:07:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:08,727 INFO L495 AbstractCegarLoop]: Abstraction has 2484 states and 2960 transitions. [2022-12-14 12:07:08,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.419753086419753) internal successors, (196), 80 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 2960 transitions. [2022-12-14 12:07:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 12:07:08,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:08,728 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:08,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-14 12:07:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-14 12:07:08,929 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash -542380024, now seen corresponding path program 18 times [2022-12-14 12:07:08,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:08,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66242801] [2022-12-14 12:07:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:08,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 64 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:09,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:09,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66242801] [2022-12-14 12:07:09,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66242801] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:09,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090529788] [2022-12-14 12:07:09,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:07:09,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:09,571 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:09,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 12:07:09,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:07:09,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:07:09,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-14 12:07:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:09,743 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:07:09,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:07:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 81 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090529788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340665401] [2022-12-14 12:07:11,078 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:07:11,079 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:11,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:11,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:11,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:11,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:11,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:07:11,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:11,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:11,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:11,251 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:07:11,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:07:11,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:13,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108960#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:13,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:13,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:13,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 65 [2022-12-14 12:07:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165209500] [2022-12-14 12:07:13,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 12:07:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:13,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 12:07:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=5482, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:07:13,730 INFO L87 Difference]: Start difference. First operand 2484 states and 2960 transitions. Second operand has 67 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:15,748 INFO L93 Difference]: Finished difference Result 2858 states and 3339 transitions. [2022-12-14 12:07:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 12:07:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 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 69 [2022-12-14 12:07:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:15,751 INFO L225 Difference]: With dead ends: 2858 [2022-12-14 12:07:15,752 INFO L226 Difference]: Without dead ends: 2858 [2022-12-14 12:07:15,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2253, Invalid=10403, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 12:07:15,752 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 606 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:15,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 1483 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 12:07:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2022-12-14 12:07:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2544. [2022-12-14 12:07:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2542 states have (on average 1.1935483870967742) internal successors, (3034), 2543 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 3034 transitions. [2022-12-14 12:07:15,772 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 3034 transitions. Word has length 69 [2022-12-14 12:07:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:15,772 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 3034 transitions. [2022-12-14 12:07:15,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 3034 transitions. [2022-12-14 12:07:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:07:15,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:15,773 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:15,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-14 12:07:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:15,974 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 179611223, now seen corresponding path program 14 times [2022-12-14 12:07:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369267101] [2022-12-14 12:07:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:16,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369267101] [2022-12-14 12:07:16,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369267101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752085190] [2022-12-14 12:07:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:07:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:16,941 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:16,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 12:07:17,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 12:07:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:07:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 12:07:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:17,178 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 18 treesize of output 16 [2022-12-14 12:07:17,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:17,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 12:07:17,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:07:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:17,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:07:17,999 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 12:07:18,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:07:18,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-14 12:07:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:18,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752085190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111180532] [2022-12-14 12:07:18,188 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:07:18,188 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:18,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:18,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:18,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:18,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:18,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:18,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:18,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:18,276 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 11 treesize of output 7 [2022-12-14 12:07:18,315 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:07:18,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:07:18,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:18,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:18,436 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:07:18,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:07:18,583 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:07:18,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:07:19,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:22,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114916#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:22,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:22,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:22,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 53 [2022-12-14 12:07:22,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53839152] [2022-12-14 12:07:22,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:22,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 12:07:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:22,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 12:07:22,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4216, Unknown=14, NotChecked=0, Total=4422 [2022-12-14 12:07:22,307 INFO L87 Difference]: Start difference. First operand 2544 states and 3034 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:25,386 INFO L93 Difference]: Finished difference Result 5588 states and 6588 transitions. [2022-12-14 12:07:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 12:07:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2022-12-14 12:07:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:25,390 INFO L225 Difference]: With dead ends: 5588 [2022-12-14 12:07:25,390 INFO L226 Difference]: Without dead ends: 3978 [2022-12-14 12:07:25,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=744, Invalid=11452, Unknown=14, NotChecked=0, Total=12210 [2022-12-14 12:07:25,390 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 612 mSDsluCounter, 2782 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 4208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:25,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2880 Invalid, 4208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 12:07:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-12-14 12:07:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 2617. [2022-12-14 12:07:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2615 states have (on average 1.1934990439770554) internal successors, (3121), 2616 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 3121 transitions. [2022-12-14 12:07:25,413 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 3121 transitions. Word has length 71 [2022-12-14 12:07:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:25,413 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 3121 transitions. [2022-12-14 12:07:25,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 3121 transitions. [2022-12-14 12:07:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:07:25,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:25,415 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:25,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 12:07:25,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 12:07:25,615 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1893798849, now seen corresponding path program 15 times [2022-12-14 12:07:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:25,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313040566] [2022-12-14 12:07:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 36 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:26,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:26,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313040566] [2022-12-14 12:07:26,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313040566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:26,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48452722] [2022-12-14 12:07:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:07:26,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:26,172 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:26,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 12:07:26,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:07:26,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:07:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 93 conjunts are in the unsatisfiable core [2022-12-14 12:07:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:26,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:27,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 12:07:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 49 proven. 199 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:27,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48452722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:27,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524399578] [2022-12-14 12:07:27,447 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:07:27,447 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:27,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:27,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:27,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:27,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:27,490 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 [2022-12-14 12:07:27,513 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 [2022-12-14 12:07:27,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:07:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:27,609 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 [2022-12-14 12:07:27,673 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:07:27,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:07:27,785 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:07:27,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:07:28,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:31,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123708#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:31,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:31,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 52 [2022-12-14 12:07:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440504926] [2022-12-14 12:07:31,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 12:07:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 12:07:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 12:07:31,173 INFO L87 Difference]: Start difference. First operand 2617 states and 3121 transitions. Second operand has 54 states, 53 states have (on average 3.2264150943396226) internal successors, (171), 53 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:32,361 INFO L93 Difference]: Finished difference Result 4223 states and 5018 transitions. [2022-12-14 12:07:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:07:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.2264150943396226) internal successors, (171), 53 states have internal predecessors, (171), 0 states have call successors, (0), 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 73 [2022-12-14 12:07:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:32,365 INFO L225 Difference]: With dead ends: 4223 [2022-12-14 12:07:32,365 INFO L226 Difference]: Without dead ends: 4223 [2022-12-14 12:07:32,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1209, Invalid=6273, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 12:07:32,366 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 745 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:32,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1030 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:07:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-12-14 12:07:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 2863. [2022-12-14 12:07:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2861 states have (on average 1.1936385879063265) internal successors, (3415), 2862 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3415 transitions. [2022-12-14 12:07:32,398 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3415 transitions. Word has length 73 [2022-12-14 12:07:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:32,398 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 3415 transitions. [2022-12-14 12:07:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.2264150943396226) internal successors, (171), 53 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3415 transitions. [2022-12-14 12:07:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:07:32,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:32,399 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:32,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 12:07:32,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:32,600 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1246954188, now seen corresponding path program 19 times [2022-12-14 12:07:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765157339] [2022-12-14 12:07:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:32,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 32 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:33,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765157339] [2022-12-14 12:07:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765157339] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454469763] [2022-12-14 12:07:33,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:07:33,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:33,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:33,361 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:33,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 12:07:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-14 12:07:33,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:33,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:33,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:07:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 32 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:33,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:33,955 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 [2022-12-14 12:07:33,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:07:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 32 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:34,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454469763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804550184] [2022-12-14 12:07:34,086 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:07:34,086 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:34,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:34,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:34,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:34,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:34,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:34,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:07:34,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:34,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:34,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:34,303 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:07:34,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:07:34,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:36,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '131329#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:36,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:36,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:36,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 50 [2022-12-14 12:07:36,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908983448] [2022-12-14 12:07:36,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:36,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 12:07:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 12:07:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3579, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 12:07:36,496 INFO L87 Difference]: Start difference. First operand 2863 states and 3415 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:38,700 INFO L93 Difference]: Finished difference Result 3996 states and 4691 transitions. [2022-12-14 12:07:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 12:07:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 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 73 [2022-12-14 12:07:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:38,703 INFO L225 Difference]: With dead ends: 3996 [2022-12-14 12:07:38,703 INFO L226 Difference]: Without dead ends: 3453 [2022-12-14 12:07:38,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=539, Invalid=7293, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 12:07:38,703 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 510 mSDsluCounter, 3477 mSDsCounter, 0 mSdLazyCounter, 3570 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:38,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 3593 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3570 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 12:07:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2022-12-14 12:07:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 3263. [2022-12-14 12:07:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3261 states have (on average 1.1953388531125422) internal successors, (3898), 3262 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 3898 transitions. [2022-12-14 12:07:38,725 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 3898 transitions. Word has length 73 [2022-12-14 12:07:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:38,725 INFO L495 AbstractCegarLoop]: Abstraction has 3263 states and 3898 transitions. [2022-12-14 12:07:38,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 3898 transitions. [2022-12-14 12:07:38,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 12:07:38,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:38,727 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:38,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 12:07:38,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:38,927 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash -365517297, now seen corresponding path program 20 times [2022-12-14 12:07:38,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:38,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468354239] [2022-12-14 12:07:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 81 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:39,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:39,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468354239] [2022-12-14 12:07:39,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468354239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:39,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736427054] [2022-12-14 12:07:39,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:07:39,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:39,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:39,768 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:39,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 12:07:40,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 12:07:40,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:07:40,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 12:07:40,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:40,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:41,344 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 [2022-12-14 12:07:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 100 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736427054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558963872] [2022-12-14 12:07:41,544 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:07:41,544 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:41,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:41,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:41,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:41,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:41,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:41,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:41,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:41,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:41,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:41,692 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:07:41,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:07:41,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:43,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '139170#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:43,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:43,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:43,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 71 [2022-12-14 12:07:43,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762278114] [2022-12-14 12:07:43,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:43,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-14 12:07:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-14 12:07:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=6217, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 12:07:43,843 INFO L87 Difference]: Start difference. First operand 3263 states and 3898 transitions. Second operand has 72 states, 71 states have (on average 2.8028169014084505) internal successors, (199), 72 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:46,317 INFO L93 Difference]: Finished difference Result 3721 states and 4362 transitions. [2022-12-14 12:07:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 12:07:46,317 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.8028169014084505) internal successors, (199), 72 states have internal predecessors, (199), 0 states have call successors, (0), 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 75 [2022-12-14 12:07:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:46,319 INFO L225 Difference]: With dead ends: 3721 [2022-12-14 12:07:46,319 INFO L226 Difference]: Without dead ends: 3721 [2022-12-14 12:07:46,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 157 SyntacticMatches, 12 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4537 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2314, Invalid=12206, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 12:07:46,320 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 612 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:46,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1148 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:07:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-12-14 12:07:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3331. [2022-12-14 12:07:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3329 states have (on average 1.1961550015019526) internal successors, (3982), 3330 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 3982 transitions. [2022-12-14 12:07:46,345 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 3982 transitions. Word has length 75 [2022-12-14 12:07:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:46,345 INFO L495 AbstractCegarLoop]: Abstraction has 3331 states and 3982 transitions. [2022-12-14 12:07:46,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.8028169014084505) internal successors, (199), 72 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:07:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 3982 transitions. [2022-12-14 12:07:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 12:07:46,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:46,346 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:46,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 12:07:46,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:46,547 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:07:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:46,548 INFO L85 PathProgramCache]: Analyzing trace with hash 926812167, now seen corresponding path program 16 times [2022-12-14 12:07:46,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:46,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780888302] [2022-12-14 12:07:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:47,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:47,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780888302] [2022-12-14 12:07:47,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780888302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:47,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029411816] [2022-12-14 12:07:47,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:07:47,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:47,659 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:47,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 12:07:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 154 conjunts are in the unsatisfiable core [2022-12-14 12:07:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:48,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:48,187 INFO L321 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-12-14 12:07:48,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 12:07:50,044 INFO L321 Elim1Store]: treesize reduction 77, result has 26.7 percent of original size [2022-12-14 12:07:50,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 47 [2022-12-14 12:07:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 18 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:51,425 INFO L321 Elim1Store]: treesize reduction 38, result has 45.7 percent of original size [2022-12-14 12:07:51,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 329 treesize of output 249 [2022-12-14 12:07:51,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:07:51,433 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 241 treesize of output 225 [2022-12-14 12:07:51,467 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-12-14 12:07:51,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 12:07:51,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 12:07:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:07:52,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029411816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:52,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521419029] [2022-12-14 12:07:52,290 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:07:52,290 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:52,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:52,291 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:52,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:07:52,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:07:52,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:07:52,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:52,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:52,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2022-12-14 12:07:52,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:52,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:07:52,521 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:07:52,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:07:52,630 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:07:52,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:07:53,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:57,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146863#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:57,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:57,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:57,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 86 [2022-12-14 12:07:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302961418] [2022-12-14 12:07:57,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:57,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 12:07:57,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 12:07:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=9529, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 12:07:57,297 INFO L87 Difference]: Start difference. First operand 3331 states and 3982 transitions. Second operand has 87 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:08:15,902 INFO L93 Difference]: Finished difference Result 7715 states and 9190 transitions. [2022-12-14 12:08:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 12:08:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 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 79 [2022-12-14 12:08:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:08:15,906 INFO L225 Difference]: With dead ends: 7715 [2022-12-14 12:08:15,906 INFO L226 Difference]: Without dead ends: 7659 [2022-12-14 12:08:15,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8011 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2024, Invalid=36196, Unknown=0, NotChecked=0, Total=38220 [2022-12-14 12:08:15,908 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1532 mSDsluCounter, 4985 mSDsCounter, 0 mSdLazyCounter, 7810 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 5127 SdHoareTripleChecker+Invalid, 7827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 7810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:08:15,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 5127 Invalid, 7827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 7810 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 12:08:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2022-12-14 12:08:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 5880. [2022-12-14 12:08:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5880 states, 5878 states have (on average 1.1964954066008846) internal successors, (7033), 5879 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 7033 transitions. [2022-12-14 12:08:15,959 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 7033 transitions. Word has length 79 [2022-12-14 12:08:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:08:15,959 INFO L495 AbstractCegarLoop]: Abstraction has 5880 states and 7033 transitions. [2022-12-14 12:08:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 7033 transitions. [2022-12-14 12:08:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 12:08:15,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:08:15,962 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:08:15,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 12:08:16,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-14 12:08:16,163 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:08:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:08:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash 83189075, now seen corresponding path program 21 times [2022-12-14 12:08:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:08:16,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042572022] [2022-12-14 12:08:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:08:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:08:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:08:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 35 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:08:16,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:08:16,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042572022] [2022-12-14 12:08:16,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042572022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:08:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045725126] [2022-12-14 12:08:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:08:16,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:08:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:08:16,998 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:08:16,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 12:08:17,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:08:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:08:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-14 12:08:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:08:17,435 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 [2022-12-14 12:08:18,799 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-12-14 12:08:18,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 12:08:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 37 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:08:18,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:08:19,708 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 31 treesize of output 27 [2022-12-14 12:08:19,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:08:19,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2022-12-14 12:08:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:08:19,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045725126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:08:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473188261] [2022-12-14 12:08:19,912 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:08:19,912 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:08:19,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:08:19,912 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:08:19,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:08:19,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:08:19,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:08:19,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:08:19,999 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 [2022-12-14 12:08:20,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:08:20,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:08:20,082 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:08:20,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:08:20,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:08:22,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161211#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:08:22,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:08:22,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:08:22,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 80 [2022-12-14 12:08:22,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668557315] [2022-12-14 12:08:22,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:08:22,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-14 12:08:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:08:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-14 12:08:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=8019, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 12:08:22,437 INFO L87 Difference]: Start difference. First operand 5880 states and 7033 transitions. Second operand has 80 states, 80 states have (on average 2.5625) internal successors, (205), 80 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:08:28,870 INFO L93 Difference]: Finished difference Result 8009 states and 9406 transitions. [2022-12-14 12:08:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 12:08:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.5625) internal successors, (205), 80 states have internal predecessors, (205), 0 states have call successors, (0), 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 79 [2022-12-14 12:08:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:08:28,875 INFO L225 Difference]: With dead ends: 8009 [2022-12-14 12:08:28,875 INFO L226 Difference]: Without dead ends: 7396 [2022-12-14 12:08:28,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 4917 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1072, Invalid=17560, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 12:08:28,876 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1013 mSDsluCounter, 5343 mSDsCounter, 0 mSdLazyCounter, 5695 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 5512 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:08:28,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 5512 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5695 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 12:08:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2022-12-14 12:08:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 6710. [2022-12-14 12:08:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6710 states, 6708 states have (on average 1.1984197972570065) internal successors, (8039), 6709 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 8039 transitions. [2022-12-14 12:08:28,925 INFO L78 Accepts]: Start accepts. Automaton has 6710 states and 8039 transitions. Word has length 79 [2022-12-14 12:08:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:08:28,925 INFO L495 AbstractCegarLoop]: Abstraction has 6710 states and 8039 transitions. [2022-12-14 12:08:28,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.5625) internal successors, (205), 80 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:08:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states and 8039 transitions. [2022-12-14 12:08:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:08:28,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:08:28,928 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:08:28,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 12:08:29,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-14 12:08:29,129 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:08:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:08:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2120751633, now seen corresponding path program 17 times [2022-12-14 12:08:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:08:29,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069651108] [2022-12-14 12:08:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:08:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:08:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:08:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 49 proven. 266 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:08:29,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:08:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069651108] [2022-12-14 12:08:29,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069651108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:08:29,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993500259] [2022-12-14 12:08:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:08:29,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:08:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:08:29,737 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:08:29,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 12:08:30,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 12:08:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:08:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-14 12:08:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:08:30,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:08:30,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-14 12:08:30,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 12:08:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:08:30,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-12-14 12:08:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:08:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:08:32,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:08:32,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2022-12-14 12:08:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 44 proven. 104 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-12-14 12:08:33,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:08:34,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2022-12-14 12:08:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 12:08:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993500259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:08:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565802497] [2022-12-14 12:08:35,843 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 12:08:35,843 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:08:35,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:08:35,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:08:35,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:08:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:08:35,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:08:35,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:08:35,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:08:35,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:08:35,959 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:08:35,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2022-12-14 12:08:35,995 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 [2022-12-14 12:08:36,010 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 [2022-12-14 12:08:36,078 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 12:08:36,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2022-12-14 12:08:36,193 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 12:08:36,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 12:08:37,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:08:40,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176580#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post2#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post2#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_#t~post2#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:08:40,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:08:40,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:08:40,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 20] total 66 [2022-12-14 12:08:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261237576] [2022-12-14 12:08:40,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:08:40,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 12:08:40,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:08:40,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 12:08:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=6018, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 12:08:40,146 INFO L87 Difference]: Start difference. First operand 6710 states and 8039 transitions. Second operand has 68 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:01,227 INFO L93 Difference]: Finished difference Result 8861 states and 10558 transitions. [2022-12-14 12:10:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-12-14 12:10:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 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 81 [2022-12-14 12:10:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:01,230 INFO L225 Difference]: With dead ends: 8861 [2022-12-14 12:10:01,230 INFO L226 Difference]: Without dead ends: 3201 [2022-12-14 12:10:01,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26470 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=17601, Invalid=70905, Unknown=0, NotChecked=0, Total=88506 [2022-12-14 12:10:01,234 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1008 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 3982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:01,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 728 Invalid, 3982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 12:10:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2022-12-14 12:10:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 1195. [2022-12-14 12:10:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 1.193467336683417) internal successors, (1425), 1194 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 1425 transitions. [2022-12-14 12:10:01,254 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 1425 transitions. Word has length 81 [2022-12-14 12:10:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:01,254 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 1425 transitions. [2022-12-14 12:10:01,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 1425 transitions. [2022-12-14 12:10:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 12:10:01,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:01,255 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:01,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:01,456 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1586774614, now seen corresponding path program 22 times [2022-12-14 12:10:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776875043] [2022-12-14 12:10:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:01,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 100 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776875043] [2022-12-14 12:10:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776875043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448728033] [2022-12-14 12:10:02,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:02,338 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:02,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 12:10:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-14 12:10:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:02,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:03,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:10:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 121 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:03,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448728033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655558838] [2022-12-14 12:10:03,706 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:03,706 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:03,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:03,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:03,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:03,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:03,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:10:03,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:03,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:03,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:03,866 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:03,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:03,989 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:06,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '187627#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:06,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:06,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:06,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 63 [2022-12-14 12:10:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828932715] [2022-12-14 12:10:06,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 12:10:06,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 12:10:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=5178, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 12:10:06,100 INFO L87 Difference]: Start difference. First operand 1195 states and 1425 transitions. Second operand has 64 states, 63 states have (on average 2.6507936507936507) internal successors, (167), 64 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:07,401 INFO L93 Difference]: Finished difference Result 1662 states and 1908 transitions. [2022-12-14 12:10:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 12:10:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.6507936507936507) internal successors, (167), 64 states have internal predecessors, (167), 0 states have call successors, (0), 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 81 [2022-12-14 12:10:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:07,402 INFO L225 Difference]: With dead ends: 1662 [2022-12-14 12:10:07,402 INFO L226 Difference]: Without dead ends: 1662 [2022-12-14 12:10:07,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1713, Invalid=9207, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 12:10:07,403 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 605 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:07,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 946 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:10:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-12-14 12:10:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1263. [2022-12-14 12:10:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 1.1957210776545166) internal successors, (1509), 1262 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1509 transitions. [2022-12-14 12:10:07,417 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1509 transitions. Word has length 81 [2022-12-14 12:10:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:07,417 INFO L495 AbstractCegarLoop]: Abstraction has 1263 states and 1509 transitions. [2022-12-14 12:10:07,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.6507936507936507) internal successors, (167), 64 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1509 transitions. [2022-12-14 12:10:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 12:10:07,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:07,418 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:07,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-14 12:10:07,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-14 12:10:07,619 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1660060134, now seen corresponding path program 23 times [2022-12-14 12:10:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:07,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129535253] [2022-12-14 12:10:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 38 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:08,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129535253] [2022-12-14 12:10:08,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129535253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213188497] [2022-12-14 12:10:08,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:08,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:08,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:08,603 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:08,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 12:10:08,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-14 12:10:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 150 conjunts are in the unsatisfiable core [2022-12-14 12:10:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:09,307 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 [2022-12-14 12:10:09,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:10:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 38 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:09,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:09,630 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 [2022-12-14 12:10:09,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:10:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 38 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:09,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213188497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252515306] [2022-12-14 12:10:09,783 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:09,783 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:09,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:09,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:09,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:09,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:09,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:10:09,858 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 [2022-12-14 12:10:09,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:09,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:09,945 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:09,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:10,051 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:12,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191182#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:12,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:12,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:12,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 56 [2022-12-14 12:10:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577421091] [2022-12-14 12:10:12,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 12:10:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 12:10:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 12:10:12,342 INFO L87 Difference]: Start difference. First operand 1263 states and 1509 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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) [2022-12-14 12:10:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:14,323 INFO L93 Difference]: Finished difference Result 2600 states and 3033 transitions. [2022-12-14 12:10:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 12:10:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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 85 [2022-12-14 12:10:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:14,325 INFO L225 Difference]: With dead ends: 2600 [2022-12-14 12:10:14,325 INFO L226 Difference]: Without dead ends: 1293 [2022-12-14 12:10:14,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=601, Invalid=9101, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 12:10:14,325 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 368 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:14,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1692 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 12:10:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-12-14 12:10:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1283. [2022-12-14 12:10:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 1.1926677067082683) internal successors, (1529), 1282 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1529 transitions. [2022-12-14 12:10:14,333 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1529 transitions. Word has length 85 [2022-12-14 12:10:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:14,333 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 1529 transitions. [2022-12-14 12:10:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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) [2022-12-14 12:10:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1529 transitions. [2022-12-14 12:10:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 12:10:14,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:14,334 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:14,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 12:10:14,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 12:10:14,535 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1507808477, now seen corresponding path program 24 times [2022-12-14 12:10:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:14,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622744823] [2022-12-14 12:10:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:14,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 121 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:15,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622744823] [2022-12-14 12:10:15,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622744823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156022062] [2022-12-14 12:10:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:15,404 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:15,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 12:10:15,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 141 conjunts are in the unsatisfiable core [2022-12-14 12:10:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:15,713 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:10:15,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:10:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:16,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 144 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:17,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156022062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162203817] [2022-12-14 12:10:17,906 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:17,906 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:17,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:17,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:17,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:17,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:17,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:10:17,987 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 [2022-12-14 12:10:18,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:18,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:18,076 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:18,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:18,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:20,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '195737#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:20,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:20,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:20,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 80 [2022-12-14 12:10:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315091401] [2022-12-14 12:10:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-14 12:10:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-14 12:10:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=7768, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 12:10:20,850 INFO L87 Difference]: Start difference. First operand 1283 states and 1529 transitions. Second operand has 82 states, 81 states have (on average 2.580246913580247) internal successors, (209), 81 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:22,545 INFO L93 Difference]: Finished difference Result 1782 states and 2044 transitions. [2022-12-14 12:10:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 12:10:22,545 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.580246913580247) internal successors, (209), 81 states have internal predecessors, (209), 0 states have call successors, (0), 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 87 [2022-12-14 12:10:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:22,546 INFO L225 Difference]: With dead ends: 1782 [2022-12-14 12:10:22,546 INFO L226 Difference]: Without dead ends: 1782 [2022-12-14 12:10:22,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4241 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2817, Invalid=12683, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 12:10:22,547 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 496 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:22,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 1037 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:10:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-12-14 12:10:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1351. [2022-12-14 12:10:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 1.1948148148148148) internal successors, (1613), 1350 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1613 transitions. [2022-12-14 12:10:22,562 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1613 transitions. Word has length 87 [2022-12-14 12:10:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:22,562 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1613 transitions. [2022-12-14 12:10:22,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.580246913580247) internal successors, (209), 81 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1613 transitions. [2022-12-14 12:10:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 12:10:22,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:22,563 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:22,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 12:10:22,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 12:10:22,764 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1182431, now seen corresponding path program 25 times [2022-12-14 12:10:22,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672989064] [2022-12-14 12:10:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:22,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 41 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:23,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:23,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672989064] [2022-12-14 12:10:23,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672989064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:23,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722637771] [2022-12-14 12:10:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:23,733 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:23,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 12:10:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 160 conjunts are in the unsatisfiable core [2022-12-14 12:10:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:24,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:24,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:10:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 41 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:24,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:24,598 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 [2022-12-14 12:10:24,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:10:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 41 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:24,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722637771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773880317] [2022-12-14 12:10:24,770 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:24,770 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:24,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:24,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:24,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:24,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:24,817 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 [2022-12-14 12:10:24,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:24,858 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 [2022-12-14 12:10:24,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:24,918 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:24,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:25,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:27,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '199543#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:27,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:27,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:27,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 59 [2022-12-14 12:10:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155273558] [2022-12-14 12:10:27,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 12:10:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 12:10:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4743, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 12:10:27,379 INFO L87 Difference]: Start difference. First operand 1351 states and 1613 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 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) [2022-12-14 12:10:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:29,305 INFO L93 Difference]: Finished difference Result 2788 states and 3253 transitions. [2022-12-14 12:10:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 12:10:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 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 91 [2022-12-14 12:10:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:29,306 INFO L225 Difference]: With dead ends: 2788 [2022-12-14 12:10:29,306 INFO L226 Difference]: Without dead ends: 1381 [2022-12-14 12:10:29,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=632, Invalid=10080, Unknown=0, NotChecked=0, Total=10712 [2022-12-14 12:10:29,307 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 467 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 2972 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:29,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 2090 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:10:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-12-14 12:10:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1371. [2022-12-14 12:10:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.191970802919708) internal successors, (1633), 1370 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1633 transitions. [2022-12-14 12:10:29,315 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1633 transitions. Word has length 91 [2022-12-14 12:10:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:29,315 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 1633 transitions. [2022-12-14 12:10:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 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) [2022-12-14 12:10:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1633 transitions. [2022-12-14 12:10:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 12:10:29,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:29,316 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:29,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 12:10:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:29,517 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash -588878428, now seen corresponding path program 26 times [2022-12-14 12:10:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:29,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353960808] [2022-12-14 12:10:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 144 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:30,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353960808] [2022-12-14 12:10:30,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353960808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686655406] [2022-12-14 12:10:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:30,503 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:30,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 12:10:31,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 12:10:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 12:10:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:31,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:32,530 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 [2022-12-14 12:10:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 169 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686655406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26979065] [2022-12-14 12:10:32,805 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:32,805 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:32,805 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:32,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:32,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:32,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:32,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:32,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:32,924 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 [2022-12-14 12:10:32,967 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:32,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:33,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:35,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '204419#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:35,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:35,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 86 [2022-12-14 12:10:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290242924] [2022-12-14 12:10:35,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:35,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-14 12:10:35,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-14 12:10:35,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1111, Invalid=8591, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 12:10:35,460 INFO L87 Difference]: Start difference. First operand 1371 states and 1633 transitions. Second operand has 87 states, 86 states have (on average 2.872093023255814) internal successors, (247), 87 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:37,030 INFO L93 Difference]: Finished difference Result 1902 states and 2180 transitions. [2022-12-14 12:10:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 12:10:37,031 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.872093023255814) internal successors, (247), 87 states have internal predecessors, (247), 0 states have call successors, (0), 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 93 [2022-12-14 12:10:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:37,032 INFO L225 Difference]: With dead ends: 1902 [2022-12-14 12:10:37,032 INFO L226 Difference]: Without dead ends: 1902 [2022-12-14 12:10:37,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 199 SyntacticMatches, 15 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2908, Invalid=14384, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 12:10:37,033 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 875 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:37,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 981 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:10:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-12-14 12:10:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1439. [2022-12-14 12:10:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 1.194019471488178) internal successors, (1717), 1438 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1717 transitions. [2022-12-14 12:10:37,052 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1717 transitions. Word has length 93 [2022-12-14 12:10:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:37,053 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1717 transitions. [2022-12-14 12:10:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.872093023255814) internal successors, (247), 87 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1717 transitions. [2022-12-14 12:10:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 12:10:37,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:37,054 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:37,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 12:10:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:37,255 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 77419112, now seen corresponding path program 27 times [2022-12-14 12:10:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:37,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777794277] [2022-12-14 12:10:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 44 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:38,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777794277] [2022-12-14 12:10:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777794277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514388877] [2022-12-14 12:10:38,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:10:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:38,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:38,437 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:38,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 12:10:38,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:10:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-14 12:10:38,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:39,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:39,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:10:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 44 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:39,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:39,488 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 [2022-12-14 12:10:39,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:10:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 44 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514388877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943402124] [2022-12-14 12:10:39,645 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:39,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:39,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:39,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:39,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:39,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:39,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:39,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:39,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:39,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:39,822 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:39,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:39,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:42,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '208476#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:42,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:42,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:42,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 62 [2022-12-14 12:10:42,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614954328] [2022-12-14 12:10:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 12:10:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 12:10:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5167, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 12:10:42,115 INFO L87 Difference]: Start difference. First operand 1439 states and 1717 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:44,206 INFO L93 Difference]: Finished difference Result 2976 states and 3473 transitions. [2022-12-14 12:10:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 12:10:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 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 97 [2022-12-14 12:10:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:44,207 INFO L225 Difference]: With dead ends: 2976 [2022-12-14 12:10:44,207 INFO L226 Difference]: Without dead ends: 1469 [2022-12-14 12:10:44,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=663, Invalid=11109, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 12:10:44,208 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 426 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:44,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2192 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:10:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-12-14 12:10:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1459. [2022-12-14 12:10:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 1.191358024691358) internal successors, (1737), 1458 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 1737 transitions. [2022-12-14 12:10:44,216 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 1737 transitions. Word has length 97 [2022-12-14 12:10:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:44,216 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 1737 transitions. [2022-12-14 12:10:44,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 1737 transitions. [2022-12-14 12:10:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 12:10:44,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:44,217 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:44,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 12:10:44,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:44,418 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1160518827, now seen corresponding path program 28 times [2022-12-14 12:10:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:44,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181225895] [2022-12-14 12:10:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 169 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:45,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:45,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181225895] [2022-12-14 12:10:45,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181225895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:45,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902197206] [2022-12-14 12:10:45,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:10:45,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:45,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:45,607 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 12:10:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:45,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 153 conjunts are in the unsatisfiable core [2022-12-14 12:10:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:46,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:47,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:10:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 196 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:47,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902197206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:10:47,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627021947] [2022-12-14 12:10:47,587 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:10:47,587 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:10:47,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:10:47,587 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:10:47,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:10:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:10:47,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:10:47,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:10:47,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:47,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:47,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:10:47,734 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:10:47,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:10:47,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:10:50,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213657#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:10:50,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:10:50,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:10:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 75 [2022-12-14 12:10:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322778342] [2022-12-14 12:10:50,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:10:50,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 12:10:50,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:10:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 12:10:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=6942, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 12:10:50,125 INFO L87 Difference]: Start difference. First operand 1459 states and 1737 transitions. Second operand has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:10:51,907 INFO L93 Difference]: Finished difference Result 2022 states and 2316 transitions. [2022-12-14 12:10:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 12:10:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 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 99 [2022-12-14 12:10:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:10:51,908 INFO L225 Difference]: With dead ends: 2022 [2022-12-14 12:10:51,908 INFO L226 Difference]: Without dead ends: 2022 [2022-12-14 12:10:51,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 229 SyntacticMatches, 16 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2415, Invalid=12591, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 12:10:51,909 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1093 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:10:51,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1093 Valid, 1444 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 12:10:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-12-14 12:10:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1527. [2022-12-14 12:10:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 1.193315858453473) internal successors, (1821), 1526 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1821 transitions. [2022-12-14 12:10:51,926 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1821 transitions. Word has length 99 [2022-12-14 12:10:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:10:51,927 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 1821 transitions. [2022-12-14 12:10:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 2.7066666666666666) internal successors, (203), 76 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:10:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1821 transitions. [2022-12-14 12:10:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 12:10:51,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:10:51,928 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:10:51,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 12:10:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:52,129 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:10:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:10:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1691756015, now seen corresponding path program 29 times [2022-12-14 12:10:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:10:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242182462] [2022-12-14 12:10:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:10:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:10:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:10:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 47 proven. 690 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:53,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:10:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242182462] [2022-12-14 12:10:53,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242182462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:10:53,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560449278] [2022-12-14 12:10:53,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:10:53,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:10:53,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:10:53,371 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:10:53,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 12:10:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 12:10:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:10:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-14 12:10:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:10:54,138 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 12:10:54,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 12:10:55,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-12-14 12:10:57,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:10:57,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-12-14 12:10:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 482 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:10:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:10:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 12:10:59,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 12:11:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 482 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:01,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560449278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:01,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431946570] [2022-12-14 12:11:01,360 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:01,360 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:01,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:01,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:01,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:01,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:01,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:01,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:01,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:01,480 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 [2022-12-14 12:11:01,516 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:01,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:01,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:04,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218015#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:04,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:04,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:04,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 114 [2022-12-14 12:11:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45775939] [2022-12-14 12:11:04,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:04,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-12-14 12:11:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:04,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-12-14 12:11:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=14821, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 12:11:04,549 INFO L87 Difference]: Start difference. First operand 1527 states and 1821 transitions. Second operand has 115 states, 115 states have (on average 2.617391304347826) internal successors, (301), 114 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:11,123 INFO L93 Difference]: Finished difference Result 3164 states and 3693 transitions. [2022-12-14 12:11:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 12:11:11,123 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.617391304347826) internal successors, (301), 114 states have internal predecessors, (301), 0 states have call successors, (0), 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 103 [2022-12-14 12:11:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:11,124 INFO L225 Difference]: With dead ends: 3164 [2022-12-14 12:11:11,124 INFO L226 Difference]: Without dead ends: 1557 [2022-12-14 12:11:11,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7513 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2669, Invalid=24721, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 12:11:11,125 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1004 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 2652 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 12:11:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-12-14 12:11:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1547. [2022-12-14 12:11:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 1.1908150064683054) internal successors, (1841), 1546 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 1841 transitions. [2022-12-14 12:11:11,134 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 1841 transitions. Word has length 103 [2022-12-14 12:11:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:11,134 INFO L495 AbstractCegarLoop]: Abstraction has 1547 states and 1841 transitions. [2022-12-14 12:11:11,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.617391304347826) internal successors, (301), 114 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 1841 transitions. [2022-12-14 12:11:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 12:11:11,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:11,135 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:11:11,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:11,336 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:11:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 99021298, now seen corresponding path program 30 times [2022-12-14 12:11:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006161123] [2022-12-14 12:11:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 196 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:12,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:12,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006161123] [2022-12-14 12:11:12,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006161123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:12,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496015664] [2022-12-14 12:11:12,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:12,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:12,653 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:12,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 12:11:13,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:13,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:13,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 168 conjunts are in the unsatisfiable core [2022-12-14 12:11:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:13,085 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:11:13,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:11:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:13,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 225 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496015664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599259402] [2022-12-14 12:11:15,835 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:15,835 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:15,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:15,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:15,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:15,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:15,909 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 14 treesize of output 10 [2022-12-14 12:11:15,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:15,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:15,994 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:15,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:16,142 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:19,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223537#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:19,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:19,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 95 [2022-12-14 12:11:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108453420] [2022-12-14 12:11:19,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 12:11:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 12:11:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=10441, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 12:11:19,381 INFO L87 Difference]: Start difference. First operand 1547 states and 1841 transitions. Second operand has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:21,761 INFO L93 Difference]: Finished difference Result 2142 states and 2452 transitions. [2022-12-14 12:11:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 12:11:21,762 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 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 105 [2022-12-14 12:11:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:21,763 INFO L225 Difference]: With dead ends: 2142 [2022-12-14 12:11:21,763 INFO L226 Difference]: Without dead ends: 2142 [2022-12-14 12:11:21,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5789 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3921, Invalid=17249, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 12:11:21,764 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 967 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:21,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1496 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 12:11:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-12-14 12:11:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1615. [2022-12-14 12:11:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 1.1926889714993805) internal successors, (1925), 1614 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 1925 transitions. [2022-12-14 12:11:21,784 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 1925 transitions. Word has length 105 [2022-12-14 12:11:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:21,784 INFO L495 AbstractCegarLoop]: Abstraction has 1615 states and 1925 transitions. [2022-12-14 12:11:21,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.6145833333333335) internal successors, (251), 96 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 1925 transitions. [2022-12-14 12:11:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 12:11:21,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:21,785 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:11:21,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 12:11:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-14 12:11:21,986 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:11:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -167313482, now seen corresponding path program 31 times [2022-12-14 12:11:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:21,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370039133] [2022-12-14 12:11:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 50 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:23,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:23,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370039133] [2022-12-14 12:11:23,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370039133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:23,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993763229] [2022-12-14 12:11:23,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:23,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:23,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:23,303 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:23,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 12:11:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 190 conjunts are in the unsatisfiable core [2022-12-14 12:11:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:23,904 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 [2022-12-14 12:11:24,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:11:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 50 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:24,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:24,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 12:11:24,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:11:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 50 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:24,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993763229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876041592] [2022-12-14 12:11:24,457 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:24,457 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:24,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:24,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:24,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:24,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:24,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:24,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-12-14 12:11:24,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:24,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:24,619 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:24,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:24,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:27,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228096#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:27,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:27,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:27,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 68 [2022-12-14 12:11:27,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672900218] [2022-12-14 12:11:27,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 12:11:27,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 12:11:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6069, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 12:11:27,296 INFO L87 Difference]: Start difference. First operand 1615 states and 1925 transitions. Second operand has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:30,898 INFO L93 Difference]: Finished difference Result 3352 states and 3913 transitions. [2022-12-14 12:11:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 12:11:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 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 109 [2022-12-14 12:11:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:30,899 INFO L225 Difference]: With dead ends: 3352 [2022-12-14 12:11:30,899 INFO L226 Difference]: Without dead ends: 1645 [2022-12-14 12:11:30,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=725, Invalid=13317, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 12:11:30,900 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 572 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 4360 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:30,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 3152 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4360 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 12:11:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-12-14 12:11:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1635. [2022-12-14 12:11:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 1.1903304773561811) internal successors, (1945), 1634 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 1945 transitions. [2022-12-14 12:11:30,909 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 1945 transitions. Word has length 109 [2022-12-14 12:11:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:30,909 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 1945 transitions. [2022-12-14 12:11:30,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3088235294117645) internal successors, (157), 68 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 1945 transitions. [2022-12-14 12:11:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 12:11:30,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:30,910 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:11:30,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 12:11:31,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-14 12:11:31,112 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:11:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1593737863, now seen corresponding path program 32 times [2022-12-14 12:11:31,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:31,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136929222] [2022-12-14 12:11:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:31,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 225 proven. 642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:32,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136929222] [2022-12-14 12:11:32,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136929222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:32,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097763213] [2022-12-14 12:11:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:11:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:32,913 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:32,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 12:11:33,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 12:11:33,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 139 conjunts are in the unsatisfiable core [2022-12-14 12:11:33,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:35,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:36,567 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 [2022-12-14 12:11:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 256 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:37,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097763213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:37,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624762275] [2022-12-14 12:11:37,076 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:37,076 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:37,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:37,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:37,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:37,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:37,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:37,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:37,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:37,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:37,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:37,255 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:37,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:37,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:40,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '233935#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:40,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:40,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:40,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 101 [2022-12-14 12:11:40,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309676459] [2022-12-14 12:11:40,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:40,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-14 12:11:40,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:40,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-14 12:11:40,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=11365, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 12:11:40,089 INFO L87 Difference]: Start difference. First operand 1635 states and 1945 transitions. Second operand has 102 states, 101 states have (on average 2.9207920792079207) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:42,707 INFO L93 Difference]: Finished difference Result 2262 states and 2588 transitions. [2022-12-14 12:11:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 12:11:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 2.9207920792079207) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 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 111 [2022-12-14 12:11:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:42,709 INFO L225 Difference]: With dead ends: 2262 [2022-12-14 12:11:42,709 INFO L226 Difference]: Without dead ends: 2262 [2022-12-14 12:11:42,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 241 SyntacticMatches, 18 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8036 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3995, Invalid=19261, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 12:11:42,710 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 962 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:42,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1179 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:11:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-12-14 12:11:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1703. [2022-12-14 12:11:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.1921269095182139) internal successors, (2029), 1702 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2029 transitions. [2022-12-14 12:11:42,731 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2029 transitions. Word has length 111 [2022-12-14 12:11:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:42,731 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2029 transitions. [2022-12-14 12:11:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 2.9207920792079207) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2029 transitions. [2022-12-14 12:11:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:11:42,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:42,733 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:11:42,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-14 12:11:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:42,934 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:11:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 575827901, now seen corresponding path program 33 times [2022-12-14 12:11:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620564047] [2022-12-14 12:11:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 53 proven. 884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:44,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620564047] [2022-12-14 12:11:44,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620564047] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:44,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533744989] [2022-12-14 12:11:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:11:44,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:44,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:44,339 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 12:11:44,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:11:44,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:11:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 198 conjunts are in the unsatisfiable core [2022-12-14 12:11:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:45,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:11:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 53 proven. 884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:45,578 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 [2022-12-14 12:11:45,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:11:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 53 proven. 884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:45,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533744989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012855505] [2022-12-14 12:11:45,741 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:45,741 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:45,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:45,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:45,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:45,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:45,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:45,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:45,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:45,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:45,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:45,926 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:45,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:46,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:48,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238745#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:48,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:48,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:48,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 71 [2022-12-14 12:11:48,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744718620] [2022-12-14 12:11:48,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 12:11:48,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:48,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 12:11:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=6547, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 12:11:48,628 INFO L87 Difference]: Start difference. First operand 1703 states and 2029 transitions. Second operand has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:11:51,889 INFO L93 Difference]: Finished difference Result 3540 states and 4133 transitions. [2022-12-14 12:11:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 12:11:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 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 115 [2022-12-14 12:11:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:11:51,890 INFO L225 Difference]: With dead ends: 3540 [2022-12-14 12:11:51,890 INFO L226 Difference]: Without dead ends: 1733 [2022-12-14 12:11:51,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 303 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=756, Invalid=14496, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 12:11:51,891 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 605 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 4590 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:11:51,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 3326 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4590 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 12:11:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-12-14 12:11:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1723. [2022-12-14 12:11:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 1.1898954703832754) internal successors, (2049), 1722 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2049 transitions. [2022-12-14 12:11:51,901 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2049 transitions. Word has length 115 [2022-12-14 12:11:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:11:51,901 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2049 transitions. [2022-12-14 12:11:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:11:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2049 transitions. [2022-12-14 12:11:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 12:11:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:11:51,902 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:11:51,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 12:11:52,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-14 12:11:52,104 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:11:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:11:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -535146688, now seen corresponding path program 34 times [2022-12-14 12:11:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:11:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307697570] [2022-12-14 12:11:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:11:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:11:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 256 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:53,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:11:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307697570] [2022-12-14 12:11:53,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307697570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:11:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008589950] [2022-12-14 12:11:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:11:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:11:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:11:53,513 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:11:53,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 12:11:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:11:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 180 conjunts are in the unsatisfiable core [2022-12-14 12:11:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:11:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:54,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:11:55,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:11:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 289 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:11:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008589950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:11:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143489955] [2022-12-14 12:11:55,768 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:11:55,768 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:11:55,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:11:55,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:11:55,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:55,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:11:55,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:11:55,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:55,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:55,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:55,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:11:55,915 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:11:55,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:11:56,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:11:58,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244886#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:11:58,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:11:58,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:11:58,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 87 [2022-12-14 12:11:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467875295] [2022-12-14 12:11:58,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:11:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 12:11:58,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:11:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 12:11:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=942, Invalid=8958, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 12:11:58,552 INFO L87 Difference]: Start difference. First operand 1723 states and 2049 transitions. Second operand has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:00,938 INFO L93 Difference]: Finished difference Result 2382 states and 2724 transitions. [2022-12-14 12:12:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 12:12:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 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 117 [2022-12-14 12:12:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:00,940 INFO L225 Difference]: With dead ends: 2382 [2022-12-14 12:12:00,940 INFO L226 Difference]: Without dead ends: 2382 [2022-12-14 12:12:00,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 274 SyntacticMatches, 19 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6204 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3243, Invalid=16497, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 12:12:00,941 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 842 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:00,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1893 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 12:12:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-12-14 12:12:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1791. [2022-12-14 12:12:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 1.1916201117318437) internal successors, (2133), 1790 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2133 transitions. [2022-12-14 12:12:00,962 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2133 transitions. Word has length 117 [2022-12-14 12:12:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:00,962 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2133 transitions. [2022-12-14 12:12:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.7471264367816093) internal successors, (239), 88 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2133 transitions. [2022-12-14 12:12:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 12:12:00,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:12:00,964 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:12:00,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 12:12:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-14 12:12:01,164 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-14 12:12:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:12:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1584462332, now seen corresponding path program 35 times [2022-12-14 12:12:01,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:12:01,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895944025] [2022-12-14 12:12:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:12:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:12:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:12:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 56 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:12:02,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:12:02,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895944025] [2022-12-14 12:12:02,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895944025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:12:02,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627485526] [2022-12-14 12:12:02,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:12:02,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:12:02,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:12:02,829 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:12:02,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 12:12:03,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-12-14 12:12:03,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:12:03,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 113 conjunts are in the unsatisfiable core [2022-12-14 12:12:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:12:03,934 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 12:12:03,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 12:12:04,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-12-14 12:12:04,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:12:04,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-12-14 12:12:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 18 proven. 92 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2022-12-14 12:12:05,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:12:06,077 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 [2022-12-14 12:12:06,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 12:12:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 18 proven. 92 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2022-12-14 12:12:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627485526] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:12:06,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126695693] [2022-12-14 12:12:06,335 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:12:06,335 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:12:06,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:12:06,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:12:06,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:12:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:12:06,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:12:06,379 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 [2022-12-14 12:12:06,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:12:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:12:06,461 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 [2022-12-14 12:12:06,497 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 12:12:06,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 12:12:06,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:12:09,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249938#(and (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.base|) (= |ULTIMATE.start_cstrspn_~spanp~0#1.base| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_cstrspn_#in~s2#1.offset|) (<= |ULTIMATE.start_cstrspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc9#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_cstrspn_~p~0#1.offset| 1) (<= 1 |ULTIMATE.start_cstrspn_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrspn_~s1#1.offset|) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s1#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc9#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~s2#1.offset|) (= (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1) |ULTIMATE.start_cstrspn_~spanp~0#1.offset|) (< (select |#length| |ULTIMATE.start_cstrspn_#t~post4#1.base|) (+ |ULTIMATE.start_cstrspn_#t~post4#1.offset| 1)) (<= 0 |ULTIMATE.start_cstrspn_#in~s1#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= |ULTIMATE.start_cstrspn_~s2#1.offset| 0) (<= |ULTIMATE.start_cstrspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 |ULTIMATE.start_cstrspn_~p~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 12:12:09,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:12:09,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:12:09,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 9, 9] total 64 [2022-12-14 12:12:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233117788] [2022-12-14 12:12:09,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:12:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 12:12:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:12:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 12:12:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5604, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 12:12:09,084 INFO L87 Difference]: Start difference. First operand 1791 states and 2133 transitions. Second operand has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:12:21,348 INFO L93 Difference]: Finished difference Result 3743 states and 4352 transitions. [2022-12-14 12:12:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 12:12:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 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 121 [2022-12-14 12:12:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:12:21,349 INFO L225 Difference]: With dead ends: 3743 [2022-12-14 12:12:21,349 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 12:12:21,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5448 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2374, Invalid=24358, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 12:12:21,350 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 485 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 5377 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 5403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:12:21,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 2437 Invalid, 5403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5377 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:12:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 12:12:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 12:12:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 12:12:21,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-12-14 12:12:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:12:21,351 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 12:12:21,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.476923076923077) internal successors, (161), 64 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:12:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 12:12:21,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-12-14 12:12:21,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-12-14 12:12:21,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-12-14 12:12:21,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-12-14 12:12:21,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-12-14 12:12:21,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-12-14 12:12:21,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-12-14 12:12:21,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 12:12:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-14 12:12:21,564 INFO L445 BasicCegarLoop]: Path program histogram: [35, 17, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:12:21,569 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:12:21,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:12:21 BoogieIcfgContainer [2022-12-14 12:12:21,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:12:21,576 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:12:21,576 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:12:21,576 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:12:21,578 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:02:31" (3/4) ... [2022-12-14 12:12:21,585 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 12:12:21,600 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-12-14 12:12:21,601 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2022-12-14 12:12:21,601 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 12:12:21,601 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 12:12:21,626 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 12:12:21,626 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:12:21,626 INFO L158 Benchmark]: Toolchain (without parser) took 590463.97ms. Allocated memory was 167.8MB in the beginning and 352.3MB in the end (delta: 184.5MB). Free memory was 134.7MB in the beginning and 152.7MB in the end (delta: -18.0MB). Peak memory consumption was 167.2MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,626 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 100.7MB. Free memory is still 47.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:12:21,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.39ms. Allocated memory is still 167.8MB. Free memory was 134.1MB in the beginning and 118.0MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.83ms. Allocated memory is still 167.8MB. Free memory was 118.0MB in the beginning and 115.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,626 INFO L158 Benchmark]: Boogie Preprocessor took 25.04ms. Allocated memory is still 167.8MB. Free memory was 115.9MB in the beginning and 114.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:12:21,627 INFO L158 Benchmark]: RCFGBuilder took 373.08ms. Allocated memory is still 167.8MB. Free memory was 114.8MB in the beginning and 96.5MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,627 INFO L158 Benchmark]: TraceAbstraction took 589640.87ms. Allocated memory was 167.8MB in the beginning and 352.3MB in the end (delta: 184.5MB). Free memory was 95.9MB in the beginning and 156.3MB in the end (delta: -60.4MB). Peak memory consumption was 127.4MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,627 INFO L158 Benchmark]: Witness Printer took 50.09ms. Allocated memory is still 352.3MB. Free memory was 156.3MB in the beginning and 152.7MB in the end (delta: 3.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:12:21,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 100.7MB. Free memory is still 47.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.39ms. Allocated memory is still 167.8MB. Free memory was 134.1MB in the beginning and 118.0MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.83ms. Allocated memory is still 167.8MB. Free memory was 118.0MB in the beginning and 115.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.04ms. Allocated memory is still 167.8MB. Free memory was 115.9MB in the beginning and 114.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 373.08ms. Allocated memory is still 167.8MB. Free memory was 114.8MB in the beginning and 96.5MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 589640.87ms. Allocated memory was 167.8MB in the beginning and 352.3MB in the end (delta: 184.5MB). Free memory was 95.9MB in the beginning and 156.3MB in the end (delta: -60.4MB). Peak memory consumption was 127.4MB. Max. memory is 16.1GB. * Witness Printer took 50.09ms. Allocated memory is still 352.3MB. Free memory was 156.3MB in the beginning and 152.7MB in the end (delta: 3.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 589.6s, OverallIterations: 70, TraceHistogramMax: 20, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.1s, AutomataDifference: 271.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 mSolverCounterUnknown, 32736 SdHoareTripleChecker+Valid, 63.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32736 mSDsluCounter, 81330 SdHoareTripleChecker+Invalid, 56.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 695 IncrementalHoareTripleChecker+Unchecked, 78004 mSDsCounter, 417 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 129595 IncrementalHoareTripleChecker+Invalid, 130758 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 417 mSolverCounterUnsat, 3326 mSDtfsCounter, 129595 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13807 GetRequests, 7700 SyntacticMatches, 217 SemanticMatches, 5890 ConstructedPredicates, 5 IntricatePredicates, 36 DeprecatedPredicates, 195968 ImplicationChecksByTransitivity, 408.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6710occurred in iteration=55, InterpolantAutomatonStates: 2747, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 70 MinimizatonAttempts, 20014 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 126.0s InterpolantComputationTime, 7007 NumberOfCodeBlocks, 7007 NumberOfCodeBlocksAsserted, 309 NumberOfCheckSat, 10279 ConstructedInterpolants, 765 QuantifiedInterpolants, 127925 SizeOfPredicates, 1769 NumberOfNonLiveVariables, 22555 ConjunctsInSsa, 5734 ConjunctsInUnsatCore, 184 InterpolantComputations, 13 PerfectInterpolantSequences, 10827/47738 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-14 12:12:21,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_794a9fa5-1fb8-4fab-9e7e-c43151391e2c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE