./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:00:20,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:00:20,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:00:21,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:00:21,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:00:21,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:00:21,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:00:21,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:00:21,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:00:21,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:00:21,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:00:21,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:00:21,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:00:21,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:00:21,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:00:21,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:00:21,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:00:21,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:00:21,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:00:21,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:00:21,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:00:21,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:00:21,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:00:21,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:00:21,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:00:21,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:00:21,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:00:21,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:00:21,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:00:21,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:00:21,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:00:21,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:00:21,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:00:21,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:00:21,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:00:21,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:00:21,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:00:21,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:00:21,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:00:21,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:00:21,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:00:21,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:00:21,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:00:21,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:00:21,149 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:00:21,149 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:00:21,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:00:21,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:00:21,151 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:00:21,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:00:21,151 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:00:21,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:00:21,152 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:00:21,153 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:00:21,153 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:00:21,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:00:21,153 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:00:21,154 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:00:21,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:00:21,154 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:00:21,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:00:21,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:00:21,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:00:21,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:00:21,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:00:21,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:00:21,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:00:21,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:00:21,156 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:00:21,157 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:00:21,157 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:00:21,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:00:21,158 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:00:21,158 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:00:21,158 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:00:21,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:00:21,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:00:21,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:00:21,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:00:21,159 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:00:21,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:00:21,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:00:21,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:00:21,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:00:21,160 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_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b1ee78e0ef345a64f8c7caca77413516ce68186d78e333a5564d6417b0fa920 [2022-11-03 02:00:21,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:00:21,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:00:21,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:00:21,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:00:21,485 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:00:21,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-03 02:00:21,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/data/1567df3d8/280b0d2315e14ddcad05adc3d90cd3f2/FLAG67bccb1f9 [2022-11-03 02:00:22,130 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:00:22,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/sv-benchmarks/c/array-memsafety/cstrlen-alloca-2.i [2022-11-03 02:00:22,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/data/1567df3d8/280b0d2315e14ddcad05adc3d90cd3f2/FLAG67bccb1f9 [2022-11-03 02:00:22,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/data/1567df3d8/280b0d2315e14ddcad05adc3d90cd3f2 [2022-11-03 02:00:22,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:00:22,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:00:22,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:00:22,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:00:22,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:00:22,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:00:22" (1/1) ... [2022-11-03 02:00:22,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6857b9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:22, skipping insertion in model container [2022-11-03 02:00:22,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:00:22" (1/1) ... [2022-11-03 02:00:22,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:00:22,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:00:22,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:00:22,925 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:00:22,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:00:23,011 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:00:23,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23 WrapperNode [2022-11-03 02:00:23,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:00:23,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:00:23,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:00:23,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:00:23,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,074 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-11-03 02:00:23,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:00:23,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:00:23,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:00:23,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:00:23,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:00:23,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:00:23,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:00:23,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:00:23,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (1/1) ... [2022-11-03 02:00:23,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:00:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:23,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:00:23,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:00:23,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:00:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:00:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:00:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:00:23,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:00:23,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:00:23,350 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:00:23,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:00:23,554 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:00:23,613 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:00:23,613 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:00:23,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:00:23 BoogieIcfgContainer [2022-11-03 02:00:23,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:00:23,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:00:23,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:00:23,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:00:23,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:00:22" (1/3) ... [2022-11-03 02:00:23,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5c16b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:00:23, skipping insertion in model container [2022-11-03 02:00:23,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:00:23" (2/3) ... [2022-11-03 02:00:23,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e5c16b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:00:23, skipping insertion in model container [2022-11-03 02:00:23,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:00:23" (3/3) ... [2022-11-03 02:00:23,629 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-2.i [2022-11-03 02:00:23,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:00:23,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-11-03 02:00:23,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:00:23,719 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;@691fd070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:00:23,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-03 02:00:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:00:23,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:23,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:00:23,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 88958, now seen corresponding path program 1 times [2022-11-03 02:00:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:23,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083011892] [2022-11-03 02:00:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:23,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:23,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083011892] [2022-11-03 02:00:23,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083011892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:23,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:00:24,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093860063] [2022-11-03 02:00:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:24,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:24,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:24,043 INFO L87 Difference]: Start difference. First operand has 16 states, 8 states have (on average 2.25) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:24,135 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-03 02:00:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 02:00:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:24,145 INFO L225 Difference]: With dead ends: 14 [2022-11-03 02:00:24,145 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 02:00:24,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:24,150 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:24,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:24,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 02:00:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 02:00:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-03 02:00:24,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2022-11-03 02:00:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:24,188 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-03 02:00:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-03 02:00:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:00:24,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:24,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:00:24,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:00:24,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 88959, now seen corresponding path program 1 times [2022-11-03 02:00:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:24,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477006340] [2022-11-03 02:00:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:24,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477006340] [2022-11-03 02:00:24,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477006340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:24,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:24,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:00:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156861703] [2022-11-03 02:00:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:24,509 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:24,594 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-11-03 02:00:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:00:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 02:00:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:24,595 INFO L225 Difference]: With dead ends: 24 [2022-11-03 02:00:24,595 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:00:24,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:00:24,597 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:24,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:00:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-11-03 02:00:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.7) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-03 02:00:24,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 3 [2022-11-03 02:00:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:24,602 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-03 02:00:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-03 02:00:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:00:24,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:24,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:00:24,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:00:24,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 90363, now seen corresponding path program 1 times [2022-11-03 02:00:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:24,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399226919] [2022-11-03 02:00:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:24,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399226919] [2022-11-03 02:00:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399226919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:00:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097750315] [2022-11-03 02:00:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:24,827 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:24,848 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-03 02:00:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 02:00:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:24,849 INFO L225 Difference]: With dead ends: 14 [2022-11-03 02:00:24,849 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 02:00:24,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:24,851 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:24,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 02:00:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-03 02:00:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-03 02:00:24,855 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2022-11-03 02:00:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:24,855 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-03 02:00:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-03 02:00:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:00:24,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:24,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:00:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:00:24,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2802126, now seen corresponding path program 1 times [2022-11-03 02:00:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:24,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424448352] [2022-11-03 02:00:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:24,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:24,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424448352] [2022-11-03 02:00:24,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424448352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:24,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:24,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:00:24,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249559571] [2022-11-03 02:00:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:00:24,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:24,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:00:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:24,956 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:24,987 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-03 02:00:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:00:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:00:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:24,989 INFO L225 Difference]: With dead ends: 13 [2022-11-03 02:00:24,989 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 02:00:24,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:00:24,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:24,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 02:00:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 02:00:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-03 02:00:24,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2022-11-03 02:00:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:24,995 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-03 02:00:24,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-03 02:00:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:00:24,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:24,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:00:24,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:00:24,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2802127, now seen corresponding path program 1 times [2022-11-03 02:00:24,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:24,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627650036] [2022-11-03 02:00:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:24,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:25,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:25,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627650036] [2022-11-03 02:00:25,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627650036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:25,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:25,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:00:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338335882] [2022-11-03 02:00:25,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:25,186 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:25,232 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-03 02:00:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:00:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:00:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:25,234 INFO L225 Difference]: With dead ends: 18 [2022-11-03 02:00:25,234 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:00:25,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:00:25,235 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:25,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:00:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-03 02:00:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-03 02:00:25,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2022-11-03 02:00:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:25,239 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-03 02:00:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-03 02:00:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:00:25,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:25,240 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 02:00:25,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:00:25,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 85522820, now seen corresponding path program 1 times [2022-11-03 02:00:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:25,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725001864] [2022-11-03 02:00:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:25,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725001864] [2022-11-03 02:00:25,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725001864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:25,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451363758] [2022-11-03 02:00:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:25,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:25,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:25,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:00:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:00:25,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:25,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:25,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:26,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451363758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:26,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912068868] [2022-11-03 02:00:26,142 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 02:00:26,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:26,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:26,152 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:26,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:26,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:26,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:26,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:26,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:26,406 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:26,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet7#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_#t~nondet7#1| 127) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:26,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:26,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:26,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-03 02:00:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955384214] [2022-11-03 02:00:26,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:00:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:00:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:00:26,623 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:26,882 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-11-03 02:00:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:00:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:00:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:26,884 INFO L225 Difference]: With dead ends: 30 [2022-11-03 02:00:26,884 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:00:26,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:00:26,885 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:26,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:00:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 11. [2022-11-03 02:00:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-03 02:00:26,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2022-11-03 02:00:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:26,889 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-03 02:00:26,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-03 02:00:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:00:26,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:26,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:00:26,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:27,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:27,090 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1602123832, now seen corresponding path program 1 times [2022-11-03 02:00:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:27,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397745785] [2022-11-03 02:00:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:27,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397745785] [2022-11-03 02:00:27,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397745785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:27,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:27,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:00:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360041630] [2022-11-03 02:00:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:27,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:00:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:00:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:00:27,264 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:27,343 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 02:00:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:00:27,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 02:00:27,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:27,345 INFO L225 Difference]: With dead ends: 19 [2022-11-03 02:00:27,345 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 02:00:27,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:00:27,347 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:27,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 02:00:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-03 02:00:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-03 02:00:27,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2022-11-03 02:00:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:27,357 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-03 02:00:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-03 02:00:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:00:27,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:27,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:00:27,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1873767508, now seen corresponding path program 1 times [2022-11-03 02:00:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730741087] [2022-11-03 02:00:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:27,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:27,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:27,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730741087] [2022-11-03 02:00:27,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730741087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:27,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:00:27,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:00:27,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686242202] [2022-11-03 02:00:27,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:27,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:00:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:00:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:27,464 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:27,477 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-11-03 02:00:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:00:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:00:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:27,478 INFO L225 Difference]: With dead ends: 14 [2022-11-03 02:00:27,478 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 02:00:27,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:00:27,479 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:27,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:00:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 02:00:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-03 02:00:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-03 02:00:27,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-03 02:00:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-03 02:00:27,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-03 02:00:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:00:27,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:27,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:00:27,488 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:27,489 INFO L85 PathProgramCache]: Analyzing trace with hash 937389987, now seen corresponding path program 1 times [2022-11-03 02:00:27,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:27,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077794172] [2022-11-03 02:00:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:27,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:27,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077794172] [2022-11-03 02:00:27,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077794172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:27,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426658619] [2022-11-03 02:00:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:27,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:27,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:00:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:00:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:27,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:27,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426658619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093923698] [2022-11-03 02:00:27,943 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:27,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:27,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:27,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:27,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:27,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:27,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:28,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:28,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:28,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:28,264 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:28,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:28,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:28,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:28,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-03 02:00:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15890345] [2022-11-03 02:00:28,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:00:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:00:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:00:28,610 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:28,736 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-03 02:00:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:00:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:00:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:28,738 INFO L225 Difference]: With dead ends: 13 [2022-11-03 02:00:28,738 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 02:00:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:00:28,739 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 02:00:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-11-03 02:00:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-03 02:00:28,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-11-03 02:00:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:28,743 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-03 02:00:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-03 02:00:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:00:28,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:28,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:28,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:28,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:28,953 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1111355236, now seen corresponding path program 2 times [2022-11-03 02:00:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:28,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113648218] [2022-11-03 02:00:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:29,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113648218] [2022-11-03 02:00:29,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113648218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:29,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601280327] [2022-11-03 02:00:29,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:29,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:29,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:00:29,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:00:29,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:00:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:29,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:29,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:29,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:29,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:29,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:29,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601280327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:29,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763952011] [2022-11-03 02:00:29,790 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:29,790 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:29,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:29,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:29,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:29,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:29,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:29,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:29,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:30,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:30,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '519#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:30,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:30,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:30,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-11-03 02:00:30,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099838071] [2022-11-03 02:00:30,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:30,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:00:30,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:00:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:00:30,762 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:31,086 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-03 02:00:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:00:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:00:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:31,087 INFO L225 Difference]: With dead ends: 19 [2022-11-03 02:00:31,087 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 02:00:31,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:00:31,089 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:31,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 02:00:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-03 02:00:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-03 02:00:31,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2022-11-03 02:00:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:31,091 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-03 02:00:31,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-03 02:00:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:00:31,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:31,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 02:00:31,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:00:31,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 568496887, now seen corresponding path program 3 times [2022-11-03 02:00:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119025700] [2022-11-03 02:00:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:31,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119025700] [2022-11-03 02:00:31,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119025700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186354355] [2022-11-03 02:00:31,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:31,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:31,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:31,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:31,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:00:31,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:00:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:31,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186354355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:31,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731271864] [2022-11-03 02:00:31,856 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:31,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:31,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:31,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:31,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:31,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:31,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:31,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:32,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:32,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:32,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:32,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:32,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:32,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:32,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-03 02:00:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584061717] [2022-11-03 02:00:32,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:32,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:00:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:00:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:00:32,508 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:32,692 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-03 02:00:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:00:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:00:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:32,693 INFO L225 Difference]: With dead ends: 16 [2022-11-03 02:00:32,693 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 02:00:32,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:00:32,694 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:32,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 02:00:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-03 02:00:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-03 02:00:32,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2022-11-03 02:00:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:32,697 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-03 02:00:32,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-03 02:00:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:00:32,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:32,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-11-03 02:00:32,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:00:32,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 864661232, now seen corresponding path program 4 times [2022-11-03 02:00:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:32,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167369550] [2022-11-03 02:00:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:33,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167369550] [2022-11-03 02:00:33,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167369550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144011223] [2022-11-03 02:00:33,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:33,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:33,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:00:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:00:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:33,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:33,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:33,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:33,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:33,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 02:00:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:33,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144011223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654335444] [2022-11-03 02:00:33,836 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:33,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:33,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:33,836 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:33,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:33,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:33,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:33,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:33,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:34,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:34,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '808#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:34,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:34,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-11-03 02:00:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134991849] [2022-11-03 02:00:34,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:34,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:00:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:00:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:00:34,561 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:34,864 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-11-03 02:00:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:00:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 02:00:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:34,865 INFO L225 Difference]: With dead ends: 25 [2022-11-03 02:00:34,865 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:00:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:00:34,866 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:34,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:00:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-03 02:00:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-03 02:00:34,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-11-03 02:00:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:34,869 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-03 02:00:34,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-03 02:00:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:00:34,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:34,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 02:00:34,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:35,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:35,077 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1264874549, now seen corresponding path program 5 times [2022-11-03 02:00:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:35,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64961926] [2022-11-03 02:00:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:35,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64961926] [2022-11-03 02:00:35,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64961926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096401105] [2022-11-03 02:00:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:35,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:35,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:35,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:00:35,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:00:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:35,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:00:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:35,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:35,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:00:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096401105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:35,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860567544] [2022-11-03 02:00:35,828 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:35,828 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:35,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:35,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:35,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:35,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:35,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:35,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:36,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:36,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:36,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '984#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:36,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:36,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:36,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-11-03 02:00:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897927901] [2022-11-03 02:00:36,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:00:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:00:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:00:36,610 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:36,911 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-03 02:00:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:00:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 02:00:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:36,912 INFO L225 Difference]: With dead ends: 20 [2022-11-03 02:00:36,912 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 02:00:36,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:00:36,914 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:36,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 02:00:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-03 02:00:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-03 02:00:36,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-11-03 02:00:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:36,917 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-03 02:00:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-03 02:00:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:00:36,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:36,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-03 02:00:36,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:37,129 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -68697404, now seen corresponding path program 6 times [2022-11-03 02:00:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280229348] [2022-11-03 02:00:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:37,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:37,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280229348] [2022-11-03 02:00:37,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280229348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591928473] [2022-11-03 02:00:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:37,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:37,525 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:37,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:00:37,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:37,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:00:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:37,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:37,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:37,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:37,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:37,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591928473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762685707] [2022-11-03 02:00:38,023 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:38,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:38,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:38,024 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:38,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:38,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:38,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:38,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:38,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:38,173 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:38,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1166#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:38,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:38,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:38,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-03 02:00:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039779138] [2022-11-03 02:00:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:38,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:00:38,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:00:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:38,714 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:39,061 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-03 02:00:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:00:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:00:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:39,062 INFO L225 Difference]: With dead ends: 31 [2022-11-03 02:00:39,062 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 02:00:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:00:39,063 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 02:00:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-03 02:00:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-11-03 02:00:39,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-11-03 02:00:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:39,067 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-11-03 02:00:39,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-11-03 02:00:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:00:39,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:39,068 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2022-11-03 02:00:39,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 02:00:39,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:00:39,273 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1262896609, now seen corresponding path program 7 times [2022-11-03 02:00:39,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:39,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763980814] [2022-11-03 02:00:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:39,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:39,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763980814] [2022-11-03 02:00:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763980814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742183446] [2022-11-03 02:00:39,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:39,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:39,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:39,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:00:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:00:39,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:39,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:39,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:40,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742183446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785558066] [2022-11-03 02:00:40,227 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:40,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:40,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:40,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:40,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:40,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:40,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:40,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:40,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:40,382 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:40,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1386#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:40,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:40,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:40,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-11-03 02:00:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506720058] [2022-11-03 02:00:40,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:40,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:00:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:00:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:00:40,916 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:41,202 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-11-03 02:00:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:00:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:00:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:41,203 INFO L225 Difference]: With dead ends: 24 [2022-11-03 02:00:41,203 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 02:00:41,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:00:41,205 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:41,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 2 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 02:00:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-03 02:00:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-03 02:00:41,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-11-03 02:00:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:41,208 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-03 02:00:41,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:41,209 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-03 02:00:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:00:41,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:41,209 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2022-11-03 02:00:41,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:41,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:00:41,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1832102936, now seen corresponding path program 8 times [2022-11-03 02:00:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:41,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911985370] [2022-11-03 02:00:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:41,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:41,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911985370] [2022-11-03 02:00:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911985370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:41,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317222809] [2022-11-03 02:00:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:41,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:41,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:41,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:00:41,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:00:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:00:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:42,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:42,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:42,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:42,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:42,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317222809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706384748] [2022-11-03 02:00:42,364 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:42,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:42,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:42,365 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:42,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:42,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:42,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:42,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:42,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:42,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:43,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1605#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:43,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:43,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-11-03 02:00:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423497402] [2022-11-03 02:00:43,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:00:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:00:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:00:43,254 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:43,706 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-11-03 02:00:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:00:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 02:00:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:43,707 INFO L225 Difference]: With dead ends: 37 [2022-11-03 02:00:43,707 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:00:43,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:00:43,709 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:43,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 24 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:00:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-03 02:00:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-03 02:00:43,712 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-11-03 02:00:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:43,712 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-03 02:00:43,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-03 02:00:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:00:43,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:43,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1] [2022-11-03 02:00:43,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:43,941 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash -214663693, now seen corresponding path program 9 times [2022-11-03 02:00:43,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:43,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789963809] [2022-11-03 02:00:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:44,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:44,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789963809] [2022-11-03 02:00:44,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789963809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:44,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064860594] [2022-11-03 02:00:44,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:44,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:44,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:00:44,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:44,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:00:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:44,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:44,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:45,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064860594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:45,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985218307] [2022-11-03 02:00:45,143 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:45,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:45,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:45,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:45,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:45,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:45,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:45,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:45,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:45,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:45,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:45,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:45,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:45,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:45,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-03 02:00:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847787299] [2022-11-03 02:00:45,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:45,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:00:45,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:45,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:00:45,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:00:45,772 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:46,181 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-03 02:00:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:00:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 02:00:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:46,182 INFO L225 Difference]: With dead ends: 28 [2022-11-03 02:00:46,182 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 02:00:46,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=404, Invalid=1948, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 02:00:46,184 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:46,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 02:00:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-03 02:00:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-03 02:00:46,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-11-03 02:00:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:46,187 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-03 02:00:46,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-03 02:00:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:00:46,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:46,188 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2022-11-03 02:00:46,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:46,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:00:46,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash -133379348, now seen corresponding path program 10 times [2022-11-03 02:00:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:46,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744121453] [2022-11-03 02:00:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:46,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:46,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744121453] [2022-11-03 02:00:46,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744121453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:46,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203050399] [2022-11-03 02:00:46,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:46,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:46,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:46,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:46,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:00:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:00:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:47,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:47,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:47,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:47,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:47,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:47,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203050399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702800722] [2022-11-03 02:00:47,510 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:47,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:47,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:47,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:47,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:47,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:47,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:47,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:47,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:47,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:48,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2124#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:48,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:48,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-11-03 02:00:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432099899] [2022-11-03 02:00:48,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:00:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:00:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:00:48,208 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:48,825 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-11-03 02:00:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:00:48,825 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 02:00:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:48,826 INFO L225 Difference]: With dead ends: 43 [2022-11-03 02:00:48,826 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:00:48,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:00:48,828 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:48,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 431 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-03 02:00:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:00:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-03 02:00:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-03 02:00:48,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-11-03 02:00:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:48,831 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-03 02:00:48,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-03 02:00:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:00:48,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:48,832 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1] [2022-11-03 02:00:48,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:49,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:00:49,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash 189478727, now seen corresponding path program 11 times [2022-11-03 02:00:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:49,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495239726] [2022-11-03 02:00:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:49,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495239726] [2022-11-03 02:00:49,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495239726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840003472] [2022-11-03 02:00:49,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:49,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:49,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:49,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:49,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:00:49,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 02:00:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:00:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:50,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:00:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840003472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:50,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317669173] [2022-11-03 02:00:50,349 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:50,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:50,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:50,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:50,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:50,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:50,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:00:50,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:50,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:50,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:51,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2429#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:51,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:51,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:51,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-11-03 02:00:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792685368] [2022-11-03 02:00:51,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:51,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:00:51,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:00:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:00:51,009 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:51,396 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-11-03 02:00:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:00:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 02:00:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:51,397 INFO L225 Difference]: With dead ends: 32 [2022-11-03 02:00:51,397 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:00:51,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:00:51,399 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:51,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:00:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-03 02:00:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-03 02:00:51,401 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-11-03 02:00:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:51,402 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-03 02:00:51,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-03 02:00:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:00:51,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:51,403 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2022-11-03 02:00:51,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:51,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:51,625 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429632, now seen corresponding path program 12 times [2022-11-03 02:00:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:51,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941347293] [2022-11-03 02:00:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:52,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941347293] [2022-11-03 02:00:52,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941347293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229133782] [2022-11-03 02:00:52,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:52,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:52,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:52,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:00:52,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:00:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:52,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:52,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:52,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:52,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229133782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:52,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126412630] [2022-11-03 02:00:52,921 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:52,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:52,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:52,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:52,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:52,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:52,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:52,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:53,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:53,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:53,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:53,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2722#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:53,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:53,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:53,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-11-03 02:00:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553531956] [2022-11-03 02:00:53,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:53,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:00:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:00:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:00:53,559 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:54,281 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-03 02:00:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:00:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 02:00:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:54,282 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:00:54,282 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 02:00:54,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:00:54,284 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:54,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:00:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 02:00:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-03 02:00:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-03 02:00:54,287 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-11-03 02:00:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:54,288 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-03 02:00:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-03 02:00:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:00:54,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:54,289 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1] [2022-11-03 02:00:54,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:54,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:54,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1601878501, now seen corresponding path program 13 times [2022-11-03 02:00:54,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:54,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031696431] [2022-11-03 02:00:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:54,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:55,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031696431] [2022-11-03 02:00:55,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031696431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528706372] [2022-11-03 02:00:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:55,097 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:55,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:00:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:00:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:55,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:00:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:55,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:56,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528706372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:56,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87072278] [2022-11-03 02:00:56,109 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:56,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:56,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:56,110 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:56,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:56,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:56,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:56,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:56,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:56,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:56,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:56,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3071#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:56,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:56,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:56,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-11-03 02:00:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227806800] [2022-11-03 02:00:56,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 02:00:56,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:56,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 02:00:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:00:56,800 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:57,451 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-03 02:00:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:00:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-03 02:00:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:57,452 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:00:57,452 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 02:00:57,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=630, Invalid=3030, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 02:00:57,454 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:57,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:00:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 02:00:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-03 02:00:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-03 02:00:57,457 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-11-03 02:00:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:57,457 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-03 02:00:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-03 02:00:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:00:57,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:57,458 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2022-11-03 02:00:57,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:57,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:00:57,661 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:00:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:57,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1806948076, now seen corresponding path program 14 times [2022-11-03 02:00:57,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:57,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248800052] [2022-11-03 02:00:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:57,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:58,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:58,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248800052] [2022-11-03 02:00:58,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248800052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:58,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994232767] [2022-11-03 02:00:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:58,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:58,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:58,300 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:58,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:00:58,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 02:00:58,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:00:58,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:58,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:58,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:00:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:58,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:00:58,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:00:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:59,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994232767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:59,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886659213] [2022-11-03 02:00:59,046 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:00:59,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:59,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:59,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:59,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:59,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:00:59,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:59,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:59,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:59,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:00:59,242 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:59,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3401#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:59,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:59,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:59,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-11-03 02:00:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855231811] [2022-11-03 02:00:59,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:59,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:00:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:00:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:00:59,758 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:00,615 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-03 02:01:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:01:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:01:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:00,617 INFO L225 Difference]: With dead ends: 55 [2022-11-03 02:01:00,617 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:01:00,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:01:00,618 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:00,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 18 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 800 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-03 02:01:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:01:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-03 02:01:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-03 02:01:00,621 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-11-03 02:01:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:00,622 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-03 02:01:00,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-03 02:01:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:01:00,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:00,623 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1] [2022-11-03 02:01:00,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:00,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:00,836 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash 481430127, now seen corresponding path program 15 times [2022-11-03 02:01:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:00,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755729202] [2022-11-03 02:01:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:01,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:01,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755729202] [2022-11-03 02:01:01,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755729202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:01,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597634295] [2022-11-03 02:01:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:01,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:01,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:01,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:01,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:01:01,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:01,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:01:01,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:01,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:01,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:02,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597634295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:02,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362707125] [2022-11-03 02:01:02,547 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:02,547 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:02,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:02,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:02,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:02,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:02,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:02,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:02,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:02,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:03,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3793#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:03,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:03,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:03,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 48 [2022-11-03 02:01:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944992205] [2022-11-03 02:01:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:01:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:01:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2701, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:01:03,295 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:03,859 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-03 02:01:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:01:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 02:01:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:03,860 INFO L225 Difference]: With dead ends: 40 [2022-11-03 02:01:03,860 INFO L226 Difference]: Without dead ends: 40 [2022-11-03 02:01:03,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=764, Invalid=3658, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:01:03,861 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 104 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 2 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:01:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-03 02:01:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-03 02:01:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-03 02:01:03,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2022-11-03 02:01:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:03,871 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-03 02:01:03,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 49 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-03 02:01:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:01:03,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:03,873 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2022-11-03 02:01:03,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:04,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:01:04,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1202116504, now seen corresponding path program 16 times [2022-11-03 02:01:04,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:04,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800715373] [2022-11-03 02:01:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:04,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:04,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800715373] [2022-11-03 02:01:04,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800715373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756640338] [2022-11-03 02:01:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:04,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:04,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:04,782 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:01:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:01:04,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:04,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:05,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:05,903 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:05,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:01:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:06,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:06,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:06,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 02:01:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756640338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [89539229] [2022-11-03 02:01:07,486 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:07,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:07,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:07,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:07,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:07,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:07,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:07,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:07,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:07,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:08,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4187#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:08,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:08,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:08,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 64 [2022-11-03 02:01:08,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125521971] [2022-11-03 02:01:08,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:08,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:01:08,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:08,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:01:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4559, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:01:08,750 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:09,998 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-03 02:01:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:01:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 02:01:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:09,999 INFO L225 Difference]: With dead ends: 64 [2022-11-03 02:01:09,999 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 02:01:10,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=673, Invalid=6809, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 02:01:10,001 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:10,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 5 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 564 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-11-03 02:01:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 02:01:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-11-03 02:01:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-03 02:01:10,014 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-11-03 02:01:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:10,014 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-03 02:01:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 64 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-03 02:01:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:01:10,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:10,015 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2022-11-03 02:01:10,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:10,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 02:01:10,225 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash 390126908, now seen corresponding path program 17 times [2022-11-03 02:01:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:10,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782506992] [2022-11-03 02:01:10,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:10,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:11,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782506992] [2022-11-03 02:01:11,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782506992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666874316] [2022-11-03 02:01:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:11,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:11,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:01:11,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-03 02:01:11,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:01:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:11,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:11,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:01:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:11,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:11,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:11,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:11,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666874316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:11,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742768567] [2022-11-03 02:01:11,971 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:11,971 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:11,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:11,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:11,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:11,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:12,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:12,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:12,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:12,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:12,147 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:12,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4626#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:12,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:12,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:12,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-11-03 02:01:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592546973] [2022-11-03 02:01:12,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:12,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:01:12,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:01:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:01:12,666 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:13,938 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-11-03 02:01:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:01:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-03 02:01:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:13,939 INFO L225 Difference]: With dead ends: 67 [2022-11-03 02:01:13,939 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 02:01:13,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=301, Invalid=4255, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 02:01:13,940 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:13,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 22 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1129 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2022-11-03 02:01:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 02:01:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-03 02:01:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-03 02:01:13,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2022-11-03 02:01:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:13,943 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-03 02:01:13,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-03 02:01:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:01:13,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:13,944 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1] [2022-11-03 02:01:13,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:14,145 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1149842327, now seen corresponding path program 18 times [2022-11-03 02:01:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956047410] [2022-11-03 02:01:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:14,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956047410] [2022-11-03 02:01:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956047410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688482728] [2022-11-03 02:01:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:14,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:14,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:01:15,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:01:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:15,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:15,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:16,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688482728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339715966] [2022-11-03 02:01:16,286 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:16,286 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:16,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:16,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:16,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:16,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:16,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:16,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:16,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:16,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:17,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5104#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:17,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:17,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:17,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-11-03 02:01:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861252868] [2022-11-03 02:01:17,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:17,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-03 02:01:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-03 02:01:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3762, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:01:17,054 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:17,858 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-03 02:01:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:01:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 02:01:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:17,859 INFO L225 Difference]: With dead ends: 48 [2022-11-03 02:01:17,859 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:01:17,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1074, Invalid=5088, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:01:17,860 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 117 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:17,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:01:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:01:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-03 02:01:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-03 02:01:17,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2022-11-03 02:01:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:17,866 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-03 02:01:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 59 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-03 02:01:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:01:17,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:17,867 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2022-11-03 02:01:17,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-03 02:01:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:18,073 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1191880592, now seen corresponding path program 19 times [2022-11-03 02:01:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:18,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473379264] [2022-11-03 02:01:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:19,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473379264] [2022-11-03 02:01:19,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473379264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471947794] [2022-11-03 02:01:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:19,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:19,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:19,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:01:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-03 02:01:19,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:19,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:19,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:20,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:20,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:01:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:20,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:21,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:21,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 02:01:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:22,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471947794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:22,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166219386] [2022-11-03 02:01:22,619 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:22,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:22,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:22,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:22,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:22,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:22,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:22,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:22,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:22,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:22,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:23,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5578#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:23,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:23,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:23,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 76 [2022-11-03 02:01:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538075149] [2022-11-03 02:01:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:23,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-03 02:01:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-03 02:01:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=6253, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:01:23,639 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:25,215 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-03 02:01:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:01:25,215 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-03 02:01:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:25,216 INFO L225 Difference]: With dead ends: 76 [2022-11-03 02:01:25,216 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:01:25,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=874, Invalid=9226, Unknown=0, NotChecked=0, Total=10100 [2022-11-03 02:01:25,218 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:25,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 860 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-11-03 02:01:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:01:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-11-03 02:01:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-03 02:01:25,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-11-03 02:01:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:25,226 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-03 02:01:25,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7922077922077921) internal successors, (138), 76 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-03 02:01:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:01:25,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:25,227 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2022-11-03 02:01:25,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:01:25,433 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash -335157404, now seen corresponding path program 20 times [2022-11-03 02:01:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:25,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119459118] [2022-11-03 02:01:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:26,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119459118] [2022-11-03 02:01:26,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119459118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101412629] [2022-11-03 02:01:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:26,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:26,506 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:26,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:01:26,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-03 02:01:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 02:01:26,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:27,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:27,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:01:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:27,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:27,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:27,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:27,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101412629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133219668] [2022-11-03 02:01:27,657 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:27,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:27,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:27,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:27,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:27,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:27,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:27,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:27,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:27,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:28,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6097#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:28,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:28,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:28,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2022-11-03 02:01:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635883253] [2022-11-03 02:01:28,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 02:01:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 02:01:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 02:01:28,702 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:30,225 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-03 02:01:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 02:01:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 02:01:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:30,226 INFO L225 Difference]: With dead ends: 79 [2022-11-03 02:01:30,226 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 02:01:30,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=345, Invalid=5661, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 02:01:30,228 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:30,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1543 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-03 02:01:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 02:01:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-03 02:01:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-03 02:01:30,231 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2022-11-03 02:01:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:30,231 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-03 02:01:30,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-03 02:01:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:01:30,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:30,232 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1] [2022-11-03 02:01:30,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 02:01:30,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 02:01:30,449 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash 49001151, now seen corresponding path program 21 times [2022-11-03 02:01:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33333333] [2022-11-03 02:01:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 100 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:31,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33333333] [2022-11-03 02:01:31,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33333333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:31,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364944697] [2022-11-03 02:01:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:31,504 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:31,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:01:31,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:01:31,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:31,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:33,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364944697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:33,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229612179] [2022-11-03 02:01:33,412 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:33,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:33,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:33,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:33,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:33,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:33,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:33,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:33,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:33,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:33,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:34,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6661#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:34,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:34,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:34,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 68 [2022-11-03 02:01:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795596672] [2022-11-03 02:01:34,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 02:01:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 02:01:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=4995, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:01:34,226 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:35,311 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-03 02:01:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:01:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:01:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:35,312 INFO L225 Difference]: With dead ends: 56 [2022-11-03 02:01:35,312 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 02:01:35,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1440, Invalid=6750, Unknown=0, NotChecked=0, Total=8190 [2022-11-03 02:01:35,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:35,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:01:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 02:01:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-03 02:01:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-03 02:01:35,316 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2022-11-03 02:01:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:35,317 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-03 02:01:35,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 69 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-03 02:01:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:01:35,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:35,318 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2022-11-03 02:01:35,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:35,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:01:35,533 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -154534728, now seen corresponding path program 22 times [2022-11-03 02:01:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:35,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498775780] [2022-11-03 02:01:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:36,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498775780] [2022-11-03 02:01:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498775780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843341885] [2022-11-03 02:01:36,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:36,579 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:36,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:01:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 02:01:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:37,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:37,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:01:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:37,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:37,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:37,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843341885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:37,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521023664] [2022-11-03 02:01:37,633 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:37,633 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:37,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:37,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:37,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:37,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:37,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:37,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:37,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:37,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:37,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:38,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7176#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:38,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:38,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2022-11-03 02:01:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259656626] [2022-11-03 02:01:38,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:38,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:01:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:01:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:01:38,399 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:40,173 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-11-03 02:01:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:01:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-03 02:01:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:40,175 INFO L225 Difference]: With dead ends: 85 [2022-11-03 02:01:40,175 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 02:01:40,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=367, Invalid=6439, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:01:40,176 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:40,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1708 Invalid, 0 Unknown, 51 Unchecked, 0.8s Time] [2022-11-03 02:01:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 02:01:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-03 02:01:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-03 02:01:40,179 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2022-11-03 02:01:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:40,179 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-03 02:01:40,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:40,180 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-03 02:01:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:01:40,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:40,181 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1] [2022-11-03 02:01:40,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:40,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:40,396 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:40,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1154785939, now seen corresponding path program 23 times [2022-11-03 02:01:40,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:40,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180022048] [2022-11-03 02:01:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:40,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 121 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:41,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:41,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180022048] [2022-11-03 02:01:41,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180022048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:41,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239937767] [2022-11-03 02:01:41,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:41,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:41,617 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:41,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:01:41,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-03 02:01:41,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:01:41,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:42,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:43,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:01:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:44,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239937767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37039229] [2022-11-03 02:01:44,015 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:44,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:44,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:44,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:44,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:44,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:44,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:44,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:44,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:44,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:44,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7782#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:44,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:44,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:44,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 72 [2022-11-03 02:01:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19261383] [2022-11-03 02:01:44,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:44,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-03 02:01:44,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-03 02:01:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=896, Invalid=5424, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 02:01:44,841 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:45,868 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-03 02:01:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:01:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-03 02:01:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:45,869 INFO L225 Difference]: With dead ends: 60 [2022-11-03 02:01:45,869 INFO L226 Difference]: Without dead ends: 60 [2022-11-03 02:01:45,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 102 SyntacticMatches, 14 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3503 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 02:01:45,870 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 183 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:45,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 0 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:01:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-03 02:01:45,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-11-03 02:01:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-03 02:01:45,873 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2022-11-03 02:01:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:45,873 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-03 02:01:45,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-03 02:01:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:01:45,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:45,874 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2022-11-03 02:01:45,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:46,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-03 02:01:46,085 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1647724428, now seen corresponding path program 24 times [2022-11-03 02:01:46,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:46,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037772536] [2022-11-03 02:01:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:46,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:47,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:47,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037772536] [2022-11-03 02:01:47,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037772536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:47,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608058311] [2022-11-03 02:01:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:47,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:47,289 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:47,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:01:47,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-03 02:01:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:48,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:48,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:01:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:48,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:48,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:48,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 14 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:48,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608058311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722853436] [2022-11-03 02:01:48,680 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:48,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:48,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:48,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:48,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:48,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:48,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:48,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:48,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:48,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:48,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:49,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8334#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:49,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:49,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2022-11-03 02:01:49,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019087354] [2022-11-03 02:01:49,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 02:01:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 02:01:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:01:49,492 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:51,492 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-03 02:01:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 02:01:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-03 02:01:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:51,493 INFO L225 Difference]: With dead ends: 91 [2022-11-03 02:01:51,493 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 02:01:51,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=389, Invalid=7267, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 02:01:51,494 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 66 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:51,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 24 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2029 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2022-11-03 02:01:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 02:01:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-03 02:01:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-03 02:01:51,497 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2022-11-03 02:01:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:51,497 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-03 02:01:51,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7924528301886793) internal successors, (95), 52 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-03 02:01:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:01:51,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:51,498 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1] [2022-11-03 02:01:51,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:51,699 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1133213721, now seen corresponding path program 25 times [2022-11-03 02:01:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:51,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303756476] [2022-11-03 02:01:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:51,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 144 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:52,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:52,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303756476] [2022-11-03 02:01:52,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303756476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:52,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406854986] [2022-11-03 02:01:52,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:52,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:52,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:52,704 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:52,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 02:01:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:52,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 02:01:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:52,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:01:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:53,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406854986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142296594] [2022-11-03 02:01:54,857 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:54,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:54,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:54,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:54,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:54,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:54,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:54,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:54,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:54,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:55,029 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:01:55,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8984#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:01:55,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:01:55,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:55,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 78 [2022-11-03 02:01:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665404908] [2022-11-03 02:01:55,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:55,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 02:01:55,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 02:01:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=6400, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 02:01:55,675 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:56,823 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-03 02:01:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:01:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 02:01:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:56,825 INFO L225 Difference]: With dead ends: 64 [2022-11-03 02:01:56,825 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 02:01:56,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1862, Invalid=8644, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 02:01:56,826 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 131 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:56,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 2 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:01:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 02:01:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-03 02:01:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-11-03 02:01:56,829 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2022-11-03 02:01:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:56,829 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-11-03 02:01:56,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 79 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-11-03 02:01:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:01:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:56,830 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2022-11-03 02:01:56,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:57,033 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:01:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1903306720, now seen corresponding path program 26 times [2022-11-03 02:01:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:57,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087917594] [2022-11-03 02:01:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:58,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087917594] [2022-11-03 02:01:58,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087917594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906435175] [2022-11-03 02:01:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:58,308 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:58,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:01:58,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-03 02:01:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-03 02:01:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:59,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:59,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:01:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:59,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:59,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:01:59,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:01:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 15 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:59,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906435175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106000484] [2022-11-03 02:01:59,853 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:01:59,853 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:59,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:59,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:59,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:59,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:01:59,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:01:59,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:59,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:01:59,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:00,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9573#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:00,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:00,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:00,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 55 [2022-11-03 02:02:00,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535920364] [2022-11-03 02:02:00,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:00,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 02:02:00,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 02:02:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3618, Unknown=0, NotChecked=0, Total=3782 [2022-11-03 02:02:00,766 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:03,077 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-11-03 02:02:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:02:03,077 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-03 02:02:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:03,078 INFO L225 Difference]: With dead ends: 97 [2022-11-03 02:02:03,078 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 02:02:03,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=411, Invalid=8145, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:02:03,079 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 55 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:03,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 35 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:02:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 02:02:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-11-03 02:02:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-03 02:02:03,082 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2022-11-03 02:02:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:03,082 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-03 02:02:03,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-03 02:02:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:02:03,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:03,083 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1] [2022-11-03 02:02:03,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:03,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-03 02:02:03,309 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash 127058619, now seen corresponding path program 27 times [2022-11-03 02:02:03,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:03,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628117613] [2022-11-03 02:02:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 169 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:04,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628117613] [2022-11-03 02:02:04,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628117613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184997648] [2022-11-03 02:02:04,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:02:04,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:04,437 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:04,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:02:04,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:02:04,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:04,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:05,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:07,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184997648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:07,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675348261] [2022-11-03 02:02:07,466 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:07,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:07,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:07,466 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:07,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:07,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:07,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:07,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:07,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:07,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:07,650 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:08,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10264#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:08,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:08,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:08,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 81 [2022-11-03 02:02:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242560631] [2022-11-03 02:02:08,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:08,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-03 02:02:08,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-03 02:02:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=6820, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 02:02:08,321 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:09,530 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-11-03 02:02:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:02:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-03 02:02:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:09,531 INFO L225 Difference]: With dead ends: 68 [2022-11-03 02:02:09,531 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 02:02:09,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2081, Invalid=9261, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:02:09,532 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 177 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:09,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:02:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 02:02:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-03 02:02:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-11-03 02:02:09,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2022-11-03 02:02:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:09,535 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-11-03 02:02:09,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 82 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-11-03 02:02:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 02:02:09,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:09,536 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2022-11-03 02:02:09,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-03 02:02:09,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-03 02:02:09,741 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1844247988, now seen corresponding path program 28 times [2022-11-03 02:02:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764928588] [2022-11-03 02:02:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:11,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764928588] [2022-11-03 02:02:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764928588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144862678] [2022-11-03 02:02:11,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:02:11,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:11,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:11,084 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:11,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 02:02:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-03 02:02:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:11,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:12,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:02:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:12,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:02:12,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 16 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:12,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144862678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559291104] [2022-11-03 02:02:12,461 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:12,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:12,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:12,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:12,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:12,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:12,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:12,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:12,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:12,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:12,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:13,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10890#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:13,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:13,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:13,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2022-11-03 02:02:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917666463] [2022-11-03 02:02:13,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:13,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 02:02:13,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 02:02:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3989, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 02:02:13,326 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:15,858 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2022-11-03 02:02:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-03 02:02:15,859 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 02:02:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:15,859 INFO L225 Difference]: With dead ends: 103 [2022-11-03 02:02:15,859 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 02:02:15,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=433, Invalid=9073, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:02:15,860 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 92 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:15,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 31 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:02:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 02:02:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-03 02:02:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-03 02:02:15,863 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2022-11-03 02:02:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:15,863 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-03 02:02:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.8135593220338984) internal successors, (107), 58 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-03 02:02:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:02:15,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:15,864 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1] [2022-11-03 02:02:15,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:16,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-03 02:02:16,064 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2050929423, now seen corresponding path program 29 times [2022-11-03 02:02:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:16,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36031923] [2022-11-03 02:02:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:16,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:17,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36031923] [2022-11-03 02:02:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36031923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810046406] [2022-11-03 02:02:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:17,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:17,397 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:17,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:02:17,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 02:02:17,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-03 02:02:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:19,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:20,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-03 02:02:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 225 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:20,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810046406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613750494] [2022-11-03 02:02:20,679 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:20,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:20,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:20,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:20,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:20,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:20,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:20,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:20,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:20,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:20,844 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:21,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11625#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:21,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:21,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:21,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 87 [2022-11-03 02:02:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871153293] [2022-11-03 02:02:21,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-03 02:02:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-03 02:02:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=7647, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 02:02:21,480 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:22,811 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-03 02:02:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:02:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:02:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:22,812 INFO L225 Difference]: With dead ends: 72 [2022-11-03 02:02:22,812 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 02:02:22,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 126 SyntacticMatches, 17 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5051 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2338, Invalid=10544, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:02:22,813 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 254 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:22,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 0 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:02:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 02:02:22,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-11-03 02:02:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-11-03 02:02:22,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2022-11-03 02:02:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:22,815 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-11-03 02:02:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-11-03 02:02:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:02:22,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:22,817 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2022-11-03 02:02:22,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 02:02:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:23,025 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -446813944, now seen corresponding path program 30 times [2022-11-03 02:02:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:23,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451982687] [2022-11-03 02:02:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 17 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:24,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451982687] [2022-11-03 02:02:24,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451982687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739961508] [2022-11-03 02:02:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:02:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:24,531 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:24,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:02:24,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:02:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-03 02:02:24,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:25,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:29,321 INFO L356 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2022-11-03 02:02:29,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2022-11-03 02:02:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 42 proven. 503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:32,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2022-11-03 02:02:32,170 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:02:32,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 67 [2022-11-03 02:02:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 47 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739961508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114335420] [2022-11-03 02:02:32,957 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:32,957 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:32,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:32,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:32,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:32,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:32,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:02:33,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:33,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:33,102 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:34,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12334#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:34,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:34,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:34,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 43, 43] total 107 [2022-11-03 02:02:34,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452239746] [2022-11-03 02:02:34,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:34,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-03 02:02:34,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-03 02:02:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=12229, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:02:34,394 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:45,320 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-11-03 02:02:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:02:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-11-03 02:02:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:45,321 INFO L225 Difference]: With dead ends: 109 [2022-11-03 02:02:45,321 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:02:45,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 5172 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1448, Invalid=22422, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 02:02:45,323 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 109 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:45,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 32 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2415 Invalid, 0 Unknown, 377 Unchecked, 1.1s Time] [2022-11-03 02:02:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:02:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-03 02:02:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-03 02:02:45,326 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2022-11-03 02:02:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:45,327 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-03 02:02:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.7037037037037037) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-03 02:02:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:02:45,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:45,328 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1] [2022-11-03 02:02:45,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:45,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-03 02:02:45,549 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1557117155, now seen corresponding path program 31 times [2022-11-03 02:02:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501962729] [2022-11-03 02:02:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:45,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 225 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:47,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501962729] [2022-11-03 02:02:47,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501962729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485494809] [2022-11-03 02:02:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:02:47,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:47,054 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:02:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 02:02:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:47,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 256 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:50,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485494809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:50,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871518522] [2022-11-03 02:02:50,067 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:50,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:50,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:50,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:50,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:50,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:50,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:02:50,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:50,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:50,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:51,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13130#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:51,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:51,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:51,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 93 [2022-11-03 02:02:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739825443] [2022-11-03 02:02:51,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:51,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-03 02:02:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-03 02:02:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1270, Invalid=8830, Unknown=0, NotChecked=0, Total=10100 [2022-11-03 02:02:51,076 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:52,848 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-11-03 02:02:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:02:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-03 02:02:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:52,850 INFO L225 Difference]: With dead ends: 76 [2022-11-03 02:02:52,850 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:02:52,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2600, Invalid=11920, Unknown=0, NotChecked=0, Total=14520 [2022-11-03 02:02:52,851 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:02:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:02:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-03 02:02:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-03 02:02:52,853 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2022-11-03 02:02:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:52,854 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-03 02:02:52,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-03 02:02:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:02:52,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:52,855 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2022-11-03 02:02:52,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:53,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-03 02:02:53,055 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:02:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1740966364, now seen corresponding path program 32 times [2022-11-03 02:02:53,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100606100] [2022-11-03 02:02:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:54,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100606100] [2022-11-03 02:02:54,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100606100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:02:54,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983971961] [2022-11-03 02:02:54,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:02:54,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:54,640 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:02:55,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-03 02:02:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-03 02:02:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:56,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:56,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:02:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:56,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:56,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:02:56,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 18 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983971961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079830249] [2022-11-03 02:02:56,789 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:02:56,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:56,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:56,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:56,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:56,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:02:56,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:56,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:56,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:56,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:02:56,964 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:57,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13830#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:57,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:57,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:57,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2022-11-03 02:02:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323331082] [2022-11-03 02:02:57,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:02:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:02:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4785, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:02:57,679 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:00,812 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2022-11-03 02:03:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:03:00,812 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-03 02:03:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:00,813 INFO L225 Difference]: With dead ends: 115 [2022-11-03 02:03:00,813 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 02:03:00,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=477, Invalid=11079, Unknown=0, NotChecked=0, Total=11556 [2022-11-03 02:03:00,814 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:00,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 38 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:03:00,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 02:03:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-03 02:03:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-03 02:03:00,816 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2022-11-03 02:03:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-03 02:03:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 64 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-03 02:03:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:03:00,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:00,818 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1] [2022-11-03 02:03:00,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:01,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-03 02:03:01,025 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:03:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1444596681, now seen corresponding path program 33 times [2022-11-03 02:03:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683990880] [2022-11-03 02:03:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:01,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 256 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:02,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683990880] [2022-11-03 02:03:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683990880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:02,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546013172] [2022-11-03 02:03:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:03:02,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:02,282 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:02,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:03:03,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:03:03,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 02:03:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:03,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:04,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 289 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:06,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546013172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:06,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759703431] [2022-11-03 02:03:06,493 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:03:06,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:06,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:06,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:06,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:06,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:03:06,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:06,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:06,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:06,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:06,663 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:07,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14650#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:07,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:07,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:07,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 96 [2022-11-03 02:03:07,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716501615] [2022-11-03 02:03:07,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:07,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-03 02:03:07,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:07,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-03 02:03:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1393, Invalid=9319, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 02:03:07,403 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:09,050 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-03 02:03:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:03:09,050 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-03 02:03:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:09,051 INFO L225 Difference]: With dead ends: 80 [2022-11-03 02:03:09,051 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 02:03:09,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2861, Invalid=12639, Unknown=0, NotChecked=0, Total=15500 [2022-11-03 02:03:09,052 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 293 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:09,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:03:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 02:03:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-11-03 02:03:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-03 02:03:09,054 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2022-11-03 02:03:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-03 02:03:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 97 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-03 02:03:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:03:09,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:09,055 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2022-11-03 02:03:09,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:09,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-03 02:03:09,265 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:03:09,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash -982974416, now seen corresponding path program 34 times [2022-11-03 02:03:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215637953] [2022-11-03 02:03:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:09,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:10,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215637953] [2022-11-03 02:03:10,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215637953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332110661] [2022-11-03 02:03:10,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:03:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:10,996 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:10,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:03:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-03 02:03:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:12,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:12,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:03:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:12,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:12,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-03 02:03:12,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:03:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 19 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:12,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332110661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493667871] [2022-11-03 02:03:12,712 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:03:12,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:12,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:12,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:12,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:12,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:03:12,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:12,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:12,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:12,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:12,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:13,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15387#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:13,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:13,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:13,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2022-11-03 02:03:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546018749] [2022-11-03 02:03:13,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 02:03:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 02:03:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 02:03:13,632 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:17,189 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-03 02:03:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-03 02:03:17,190 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-03 02:03:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:17,190 INFO L225 Difference]: With dead ends: 121 [2022-11-03 02:03:17,190 INFO L226 Difference]: Without dead ends: 82 [2022-11-03 02:03:17,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=499, Invalid=12157, Unknown=0, NotChecked=0, Total=12656 [2022-11-03 02:03:17,192 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:17,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 46 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:03:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-03 02:03:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-11-03 02:03:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-11-03 02:03:17,194 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2022-11-03 02:03:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:17,194 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-11-03 02:03:17,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.838235294117647) internal successors, (125), 67 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-11-03 02:03:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:03:17,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:17,195 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1] [2022-11-03 02:03:17,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:17,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-03 02:03:17,396 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:03:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1281787147, now seen corresponding path program 35 times [2022-11-03 02:03:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205902999] [2022-11-03 02:03:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 289 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:18,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205902999] [2022-11-03 02:03:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205902999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192470158] [2022-11-03 02:03:18,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:03:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:18,951 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:18,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:03:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-03 02:03:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:03:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:19,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:21,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 324 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:23,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192470158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684387835] [2022-11-03 02:03:23,625 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:03:23,625 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:23,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:23,626 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:23,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:23,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:03:23,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:23,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:23,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:23,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:23,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:24,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16271#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:24,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:24,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 122 [2022-11-03 02:03:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443809659] [2022-11-03 02:03:24,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-03 02:03:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-03 02:03:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2341, Invalid=14429, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 02:03:24,565 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:26,004 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2022-11-03 02:03:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:03:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 02:03:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:26,006 INFO L225 Difference]: With dead ends: 84 [2022-11-03 02:03:26,006 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 02:03:26,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7765 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4202, Invalid=18750, Unknown=0, NotChecked=0, Total=22952 [2022-11-03 02:03:26,008 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 298 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 2 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:03:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 02:03:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-03 02:03:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-11-03 02:03:26,011 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2022-11-03 02:03:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:26,011 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-11-03 02:03:26,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.951219512195122) internal successors, (240), 123 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-11-03 02:03:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:03:26,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:26,013 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2022-11-03 02:03:26,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:26,225 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:03:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash -858166268, now seen corresponding path program 36 times [2022-11-03 02:03:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963723415] [2022-11-03 02:03:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:26,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 20 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:28,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963723415] [2022-11-03 02:03:28,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963723415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633178495] [2022-11-03 02:03:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:03:28,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:28,124 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:28,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:03:28,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:03:28,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 173 conjunts are in the unsatisfiable core [2022-11-03 02:03:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:29,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:36,671 INFO L356 Elim1Store]: treesize reduction 101, result has 10.6 percent of original size [2022-11-03 02:03:36,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 148 treesize of output 70 [2022-11-03 02:03:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 24 proven. 736 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:36,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:43,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-11-03 02:03:43,734 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:43,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 211 treesize of output 155 [2022-11-03 02:03:45,157 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-11-03 02:03:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 202 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:48,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633178495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332273214] [2022-11-03 02:03:48,199 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:03:48,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:48,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:48,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:48,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:48,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:03:48,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:03:48,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:48,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:03:48,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:49,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17128#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:49,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:49,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 57, 57] total 153 [2022-11-03 02:03:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781084458] [2022-11-03 02:03:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-11-03 02:03:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-11-03 02:03:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1627, Invalid=23812, Unknown=1, NotChecked=0, Total=25440 [2022-11-03 02:03:49,997 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:38,039 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2022-11-03 02:04:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-03 02:04:38,040 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-03 02:04:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:38,040 INFO L225 Difference]: With dead ends: 127 [2022-11-03 02:04:38,040 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 02:04:38,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8400 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=3069, Invalid=43370, Unknown=1, NotChecked=0, Total=46440 [2022-11-03 02:04:38,043 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3359 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:38,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 53 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3359 Invalid, 0 Unknown, 270 Unchecked, 1.7s Time] [2022-11-03 02:04:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 02:04:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-03 02:04:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-03 02:04:38,046 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2022-11-03 02:04:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:38,047 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-03 02:04:38,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 153 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-03 02:04:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 02:04:38,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:38,048 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1] [2022-11-03 02:04:38,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:38,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:38,257 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:04:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash -578614433, now seen corresponding path program 37 times [2022-11-03 02:04:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489768740] [2022-11-03 02:04:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 324 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:40,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489768740] [2022-11-03 02:04:40,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489768740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378507724] [2022-11-03 02:04:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:04:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:40,200 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:40,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:04:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-03 02:04:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:40,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:04:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:41,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 361 proven. 439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:44,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378507724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158530386] [2022-11-03 02:04:44,091 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:04:44,091 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:44,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:44,092 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:44,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:44,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:04:44,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:04:44,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:44,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:44,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:04:45,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18069#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:04:45,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:04:45,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:45,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 108 [2022-11-03 02:04:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443376067] [2022-11-03 02:04:45,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-03 02:04:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-03 02:04:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1693, Invalid=11647, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:04:45,220 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:47,654 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-11-03 02:04:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:04:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-03 02:04:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:47,655 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:04:47,656 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 02:04:47,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5791 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3464, Invalid=15718, Unknown=0, NotChecked=0, Total=19182 [2022-11-03 02:04:47,657 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:47,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:04:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 02:04:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-11-03 02:04:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-11-03 02:04:47,660 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2022-11-03 02:04:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:47,661 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-11-03 02:04:47,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 109 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-11-03 02:04:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:04:47,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:47,662 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2022-11-03 02:04:47,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:47,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-03 02:04:47,862 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-03 02:04:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:47,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1997689512, now seen corresponding path program 38 times [2022-11-03 02:04:47,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:47,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980578416] [2022-11-03 02:04:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:47,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 21 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:50,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:50,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980578416] [2022-11-03 02:04:50,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980578416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:50,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503184300] [2022-11-03 02:04:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:04:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:50,167 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:04:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-03 02:04:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-03 02:04:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:52,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:04:52,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:04:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:55,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:55,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:04:55,346 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:04:55,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 37 [2022-11-03 02:04:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 327 proven. 163 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-03 02:04:55,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:58,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2022-11-03 02:04:58,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-11-03 02:04:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 64 proven. 339 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-11-03 02:04:59,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503184300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:59,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1289155751] [2022-11-03 02:04:59,301 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 02:04:59,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:59,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:04:59,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:04:59,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:04:59,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 02:04:59,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:04:59,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:59,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 02:04:59,448 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:00,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18894#(and (<= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |ULTIMATE.start_main_#t~malloc5#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (< (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) (+ |ULTIMATE.start_cstrlen_~p~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.offset|) (<= 0 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrlen_~s#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:05:00,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:05:00,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:00,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 22, 19] total 87 [2022-11-03 02:05:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742359205] [2022-11-03 02:05:00,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-03 02:05:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-03 02:05:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=8263, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 02:05:00,697 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 88 states, 88 states have (on average 1.75) internal successors, (154), 87 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) [2022-11-03 02:05:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:10,374 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-11-03 02:05:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-03 02:05:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.75) internal successors, (154), 87 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 86 [2022-11-03 02:05:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:10,374 INFO L225 Difference]: With dead ends: 132 [2022-11-03 02:05:10,375 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:05:10,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5039 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=2164, Invalid=27248, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 02:05:10,381 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:10,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2374 Invalid, 0 Unknown, 61 Unchecked, 1.2s Time] [2022-11-03 02:05:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:05:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:05:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:05:10,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-11-03 02:05:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:10,382 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:05:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.75) internal successors, (154), 87 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) [2022-11-03 02:05:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:05:10,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:05:10,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2022-11-03 02:05:10,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-03 02:05:10,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-03 02:05:10,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-03 02:05:10,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-03 02:05:10,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2022-11-03 02:05:10,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-03 02:05:10,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-03 02:05:10,612 INFO L444 BasicCegarLoop]: Path program histogram: [38, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:10,614 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:05:10,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:05:10 BoogieIcfgContainer [2022-11-03 02:05:10,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:05:10,617 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:05:10,617 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:05:10,618 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:05:10,618 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:00:23" (3/4) ... [2022-11-03 02:05:10,621 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 02:05:10,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-03 02:05:10,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-03 02:05:10,632 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-03 02:05:10,633 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 02:05:10,667 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:05:10,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:05:10,672 INFO L158 Benchmark]: Toolchain (without parser) took 288239.12ms. Allocated memory was 107.0MB in the beginning and 285.2MB in the end (delta: 178.3MB). Free memory was 68.2MB in the beginning and 130.7MB in the end (delta: -62.5MB). Peak memory consumption was 116.1MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,673 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:05:10,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 578.85ms. Allocated memory is still 107.0MB. Free memory was 68.0MB in the beginning and 77.5MB in the end (delta: -9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,673 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.70ms. Allocated memory is still 107.0MB. Free memory was 77.0MB in the beginning and 75.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,673 INFO L158 Benchmark]: Boogie Preprocessor took 44.51ms. Allocated memory is still 107.0MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:05:10,674 INFO L158 Benchmark]: RCFGBuilder took 495.56ms. Allocated memory is still 107.0MB. Free memory was 74.1MB in the beginning and 60.3MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,674 INFO L158 Benchmark]: TraceAbstraction took 286998.36ms. Allocated memory was 107.0MB in the beginning and 285.2MB in the end (delta: 178.3MB). Free memory was 59.8MB in the beginning and 132.3MB in the end (delta: -72.5MB). Peak memory consumption was 107.6MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,674 INFO L158 Benchmark]: Witness Printer took 51.13ms. Allocated memory is still 285.2MB. Free memory was 132.3MB in the beginning and 130.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:05:10,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 578.85ms. Allocated memory is still 107.0MB. Free memory was 68.0MB in the beginning and 77.5MB in the end (delta: -9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.70ms. Allocated memory is still 107.0MB. Free memory was 77.0MB in the beginning and 75.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.51ms. Allocated memory is still 107.0MB. Free memory was 75.4MB in the beginning and 74.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 495.56ms. Allocated memory is still 107.0MB. Free memory was 74.1MB in the beginning and 60.3MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 286998.36ms. Allocated memory was 107.0MB in the beginning and 285.2MB in the end (delta: 178.3MB). Free memory was 59.8MB in the beginning and 132.3MB in the end (delta: -72.5MB). Peak memory consumption was 107.6MB. Max. memory is 16.1GB. * Witness Printer took 51.13ms. Allocated memory is still 285.2MB. Free memory was 132.3MB in the beginning and 130.7MB in the end (delta: 1.6MB). 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: 520]: 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, 16 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 286.9s, OverallIterations: 46, TraceHistogramMax: 21, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 110.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3625 SdHoareTripleChecker+Valid, 23.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3625 mSDsluCounter, 589 SdHoareTripleChecker+Invalid, 20.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1161 IncrementalHoareTripleChecker+Unchecked, 764 mSDsCounter, 3031 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48147 IncrementalHoareTripleChecker+Invalid, 52339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3031 mSolverCounterUnsat, 67 mSDtfsCounter, 48147 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7096 GetRequests, 3784 SyntacticMatches, 90 SemanticMatches, 3222 ConstructedPredicates, 0 IntricatePredicates, 26 DeprecatedPredicates, 79174 ImplicationChecksByTransitivity, 197.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=45, InterpolantAutomatonStates: 1302, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 46 MinimizatonAttempts, 76 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 121.0s InterpolantComputationTime, 3624 NumberOfCodeBlocks, 3624 NumberOfCodeBlocksAsserted, 245 NumberOfCheckSat, 5297 ConstructedInterpolants, 213 QuantifiedInterpolants, 59519 SizeOfPredicates, 500 NumberOfNonLiveVariables, 11882 ConjunctsInSsa, 2934 ConjunctsInUnsatCore, 124 InterpolantComputations, 7 PerfectInterpolantSequences, 8882/34555 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-03 02:05:10,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6445ba8c-3b20-4831-9ef1-ebbec1180069/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE