./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/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_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/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_97378849-e628-49d0-99f6-7db97ba6dd7b/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 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 --- 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 03:58:29,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:58:29,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:58:29,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:58:29,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:58:29,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:58:29,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:58:29,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:58:29,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:58:29,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:58:29,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:58:29,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:58:29,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:58:29,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:58:29,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:58:29,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:58:29,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:58:29,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:58:29,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:58:29,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:58:29,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:58:29,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:58:29,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:58:29,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:58:29,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:58:29,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:58:29,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:58:29,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:58:29,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:58:29,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:58:29,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:58:29,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:58:29,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:58:29,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:58:29,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:58:29,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:58:29,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:58:29,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:58:29,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:58:29,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:58:29,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:58:29,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 03:58:29,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:58:29,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:58:29,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:58:29,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:58:29,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:58:29,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:58:29,362 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:58:29,362 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:58:29,362 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:58:29,363 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:58:29,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:58:29,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:58:29,364 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:58:29,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:58:29,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:58:29,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:58:29,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:58:29,365 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:58:29,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:58:29,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:58:29,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:58:29,366 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:58:29,366 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:58:29,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:58:29,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:58:29,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:58:29,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:58:29,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:58:29,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:58:29,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:58:29,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:58:29,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:58:29,374 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:58:29,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:58:29,375 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:58:29,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:58:29,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:58:29,375 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_97378849-e628-49d0-99f6-7db97ba6dd7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 [2022-11-03 03:58:29,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:58:29,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:58:29,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:58:29,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:58:29,708 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:58:29,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-03 03:58:29,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/data/3e6bedee5/295409dbc4254ac2bb2de038a5c4cb73/FLAG8eb3603f2 [2022-11-03 03:58:30,236 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:58:30,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-03 03:58:30,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/data/3e6bedee5/295409dbc4254ac2bb2de038a5c4cb73/FLAG8eb3603f2 [2022-11-03 03:58:30,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/data/3e6bedee5/295409dbc4254ac2bb2de038a5c4cb73 [2022-11-03 03:58:30,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:58:30,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:58:30,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:58:30,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:58:30,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:58:30,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:58:30" (1/1) ... [2022-11-03 03:58:30,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8810390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:30, skipping insertion in model container [2022-11-03 03:58:30,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:58:30" (1/1) ... [2022-11-03 03:58:30,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:58:30,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:58:30,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:58:30,970 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:58:31,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:58:31,027 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:58:31,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31 WrapperNode [2022-11-03 03:58:31,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:58:31,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:58:31,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:58:31,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:58:31,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,068 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-11-03 03:58:31,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:58:31,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:58:31,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:58:31,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:58:31,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:58:31,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:58:31,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:58:31,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:58:31,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (1/1) ... [2022-11-03 03:58:31,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:58:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:31,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:58:31,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:58:31,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:58:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:58:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:58:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:58:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:58:31,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:58:31,344 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:58:31,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:58:31,524 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:58:31,606 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:58:31,606 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 03:58:31,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:58:31 BoogieIcfgContainer [2022-11-03 03:58:31,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:58:31,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:58:31,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:58:31,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:58:31,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:58:30" (1/3) ... [2022-11-03 03:58:31,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a79c961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:58:31, skipping insertion in model container [2022-11-03 03:58:31,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:58:31" (2/3) ... [2022-11-03 03:58:31,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a79c961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:58:31, skipping insertion in model container [2022-11-03 03:58:31,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:58:31" (3/3) ... [2022-11-03 03:58:31,622 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2022-11-03 03:58:31,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:58:31,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-03 03:58:31,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:58:31,691 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;@375e1c1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:58:31,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-03 03:58:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 03:58:31,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:31,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 03:58:31,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 107409, now seen corresponding path program 1 times [2022-11-03 03:58:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:31,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813254998] [2022-11-03 03:58:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:31,955 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 03:58:31,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813254998] [2022-11-03 03:58:31,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813254998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:31,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:31,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 03:58:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522295763] [2022-11-03 03:58:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:58:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:58:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:58:32,000 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 03:58:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:32,066 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-03 03:58:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:32,068 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 03:58:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:32,076 INFO L225 Difference]: With dead ends: 16 [2022-11-03 03:58:32,076 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 03:58:32,078 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 03:58:32,084 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:32,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 03:58:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-03 03:58:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 14 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 03:58:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-03 03:58:32,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 3 [2022-11-03 03:58:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:32,121 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-03 03:58:32,121 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 03:58:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-03 03:58:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 03:58:32,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:32,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 03:58:32,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:58:32,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 107410, now seen corresponding path program 1 times [2022-11-03 03:58:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:32,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014728443] [2022-11-03 03:58:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:32,429 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 03:58:32,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014728443] [2022-11-03 03:58:32,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014728443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:32,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:32,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:58:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696392066] [2022-11-03 03:58:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:58:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:58:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:58:32,433 INFO L87 Difference]: Start difference. First operand 15 states and 18 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 03:58:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:32,530 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-03 03:58:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:58:32,531 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 03:58:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:32,532 INFO L225 Difference]: With dead ends: 28 [2022-11-03 03:58:32,533 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 03:58:32,534 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 03:58:32,536 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:32,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 03:58:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2022-11-03 03:58:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 03:58:32,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 3 [2022-11-03 03:58:32,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:32,550 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 03:58:32,550 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 03:58:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 03:58:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:58:32,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:32,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-03 03:58:32,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:58:32,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash 103264033, now seen corresponding path program 1 times [2022-11-03 03:58:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:32,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471233839] [2022-11-03 03:58:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:32,865 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 03:58:32,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471233839] [2022-11-03 03:58:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471233839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284205972] [2022-11-03 03:58:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:32,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:32,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:58:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:32,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:58:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:33,080 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 03:58:33,354 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 03:58:33,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:33,518 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 03:58:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284205972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549096887] [2022-11-03 03:58:33,545 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-03 03:58:33,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:33,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:33,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:33,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:33,613 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 03:58:33,705 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 03:58:33,826 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 03:58:33,891 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 03:58:33,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:34,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (not (<= (+ |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~nondetArea~0#1.offset| 1) (select |#length| |ULTIMATE.start_main_~nondetArea~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 127) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 100000 ~MAX~0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet10#1|)) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~n~0#1| 100000) (<= ~MAX~0 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:34,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:34,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-03 03:58:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283454210] [2022-11-03 03:58:34,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:58:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:58:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:58:34,397 INFO L87 Difference]: Start difference. First operand 17 states and 21 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 03:58:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:34,577 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-03 03:58:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:58:34,578 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 03:58:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:34,579 INFO L225 Difference]: With dead ends: 16 [2022-11-03 03:58:34,579 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:58:34,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:58:34,581 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:34,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:58:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-03 03:58:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 14 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 03:58:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-03 03:58:34,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2022-11-03 03:58:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:34,592 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-03 03:58:34,592 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 03:58:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-03 03:58:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:58:34,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:34,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:34,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:58:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:34,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash 454107511, now seen corresponding path program 1 times [2022-11-03 03:58:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084463569] [2022-11-03 03:58:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:34,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:34,945 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 03:58:34,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084463569] [2022-11-03 03:58:34,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084463569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:34,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:34,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:58:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368118705] [2022-11-03 03:58:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:58:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:58:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:58:34,950 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 03:58:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:35,021 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-03 03:58:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:58:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 03:58:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:35,023 INFO L225 Difference]: With dead ends: 16 [2022-11-03 03:58:35,023 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:58:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:58:35,028 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:35,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:58:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:58:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-03 03:58:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 03:58:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-03 03:58:35,043 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-11-03 03:58:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-03 03:58:35,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 03:58:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-03 03:58:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 03:58:35,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:35,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:58:35,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 454107512, now seen corresponding path program 1 times [2022-11-03 03:58:35,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:35,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098717628] [2022-11-03 03:58:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:35,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:35,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098717628] [2022-11-03 03:58:35,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098717628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:35,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357532478] [2022-11-03 03:58:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:35,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:58:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:58:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:35,594 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 03:58:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:35,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:36,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357532478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17264002] [2022-11-03 03:58:36,162 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-03 03:58:36,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:36,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:36,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:36,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:36,220 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 03:58:36,264 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 03:58:36,320 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 03:58:36,352 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 03:58:36,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:37,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_cmemrchr_~n#1| |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (= |ULTIMATE.start_cmemrchr_~c#1| |ULTIMATE.start_cmemrchr_#in~c#1|) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_cmemrchr_~cp~0#1.offset| |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|) (= |ULTIMATE.start_cmemrchr_~cp~0#1.base| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (<= |#NULL.offset| 0) (= |ULTIMATE.start_cmemrchr_#t~pre3#1.base| |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 100000 ~MAX~0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_cmemrchr_#in~n#1|) (= |ULTIMATE.start_main_~nondetArea~0#1.offset| |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_cmemrchr_#in~c#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_cmemrchr_#in~s#1.base| |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_cmemrchr_~s#1.offset| |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (= (+ (ite (<= (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296) 2147483647) (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296) (+ (- 4294967296) (mod |ULTIMATE.start_cmemrchr_~n#1| 4294967296))) |ULTIMATE.start_cmemrchr_~s#1.offset|) (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_cmemrchr_#in~s#1.base| |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= |ULTIMATE.start_main_~n~0#1| 100000) (<= ~MAX~0 100000) (= |#NULL.base| 0) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|))))' at error location [2022-11-03 03:58:37,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:37,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:37,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-03 03:58:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997748852] [2022-11-03 03:58:37,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:58:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:58:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:58:37,643 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:58:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:38,498 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-03 03:58:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:58:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:58:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:38,500 INFO L225 Difference]: With dead ends: 62 [2022-11-03 03:58:38,500 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:58:38,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:58:38,501 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 126 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:38,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 92 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:58:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:58:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 24. [2022-11-03 03:58:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-03 03:58:38,510 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2022-11-03 03:58:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:38,510 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-03 03:58:38,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states 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 03:58:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-03 03:58:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:58:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:38,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:38,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:38,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:38,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash -502521436, now seen corresponding path program 1 times [2022-11-03 03:58:38,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:38,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146974616] [2022-11-03 03:58:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:38,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:58:38,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:38,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146974616] [2022-11-03 03:58:38,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146974616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:38,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:58:38,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:58:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490930358] [2022-11-03 03:58:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:38,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:58:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:58:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:58:38,845 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:38,863 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2022-11-03 03:58:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:58:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:58:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:38,865 INFO L225 Difference]: With dead ends: 23 [2022-11-03 03:58:38,865 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:58:38,866 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 03:58:38,867 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 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 03:58:38,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:58:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:58:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-03 03:58:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 03:58:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-03 03:58:38,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2022-11-03 03:58:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:38,876 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-03 03:58:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-03 03:58:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:58:38,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:38,877 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:58:38,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash 37291176, now seen corresponding path program 1 times [2022-11-03 03:58:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:38,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021997759] [2022-11-03 03:58:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:39,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:39,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021997759] [2022-11-03 03:58:39,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021997759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:39,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201544257] [2022-11-03 03:58:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:39,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:39,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:39,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:39,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:58:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:58:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:39,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201544257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:39,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245956180] [2022-11-03 03:58:39,253 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:58:39,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:39,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:39,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:39,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:39,289 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 03:58:39,327 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 03:58:39,385 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 03:58:39,451 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 03:58:39,837 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:41,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:41,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:41,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:41,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-11-03 03:58:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645330629] [2022-11-03 03:58:41,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:41,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:58:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:58:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:58:41,495 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:41,588 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-03 03:58:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:58:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:58:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:41,590 INFO L225 Difference]: With dead ends: 24 [2022-11-03 03:58:41,590 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 03:58:41,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:58:41,591 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:58:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 03:58:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-03 03:58:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-03 03:58:41,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-03 03:58:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:41,594 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-03 03:58:41,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-03 03:58:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:58:41,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:41,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-03 03:58:41,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:41,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:41,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1191886437, now seen corresponding path program 2 times [2022-11-03 03:58:41,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:41,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404174842] [2022-11-03 03:58:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:42,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404174842] [2022-11-03 03:58:42,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404174842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180041782] [2022-11-03 03:58:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:42,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:42,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:42,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:58:42,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-03 03:58:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:58:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:42,385 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 03:58:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:58:42,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:58:42,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180041782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:58:42,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:58:42,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-11-03 03:58:42,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503247040] [2022-11-03 03:58:42,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:58:42,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:58:42,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:58:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:58:42,830 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:43,062 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-11-03 03:58:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:58:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:58:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:43,064 INFO L225 Difference]: With dead ends: 22 [2022-11-03 03:58:43,064 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 03:58:43,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:58:43,065 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:43,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 5 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:58:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 03:58:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2022-11-03 03:58:43,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 03:58:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-03 03:58:43,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2022-11-03 03:58:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:43,069 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-03 03:58:43,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-03 03:58:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:58:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:43,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:43,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 03:58:43,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:43,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1163792695, now seen corresponding path program 2 times [2022-11-03 03:58:43,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19700430] [2022-11-03 03:58:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:43,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:43,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19700430] [2022-11-03 03:58:43,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19700430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:43,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169719824] [2022-11-03 03:58:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:43,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:43,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:43,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:43,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:58:43,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:58:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:58:43,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:43,860 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 03:58:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:44,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:45,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169719824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:45,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983284905] [2022-11-03 03:58:45,631 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:58:45,631 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:45,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:45,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:45,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:45,667 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 03:58:45,706 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 03:58:45,748 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 03:58:45,768 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 03:58:46,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:47,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '759#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:47,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:47,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:47,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-03 03:58:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176564227] [2022-11-03 03:58:47,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 03:58:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 03:58:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:58:47,946 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 03:58:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:51,502 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-11-03 03:58:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:58:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:58:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:51,503 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:58:51,503 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 03:58:51,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 03:58:51,505 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:51,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:58:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 03:58:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2022-11-03 03:58:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-03 03:58:51,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 13 [2022-11-03 03:58:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:51,509 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-03 03:58:51,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 03:58:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-03 03:58:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:58:51,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:51,510 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-03 03:58:51,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:51,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:58:51,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 542675095, now seen corresponding path program 3 times [2022-11-03 03:58:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:51,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047040733] [2022-11-03 03:58:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:58:51,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:51,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047040733] [2022-11-03 03:58:51,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047040733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:51,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123272255] [2022-11-03 03:58:51,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:58:51,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:51,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:51,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:58:51,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:58:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:58:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:52,014 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 03:58:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:52,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:53,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123272255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:53,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511221333] [2022-11-03 03:58:53,457 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:58:53,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:53,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:53,458 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:53,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:58:53,486 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 03:58:53,516 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 03:58:53,562 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 03:58:53,604 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 03:58:53,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:55,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1031#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:55,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:55,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:55,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 28 [2022-11-03 03:58:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177839581] [2022-11-03 03:58:55,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:58:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:58:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:58:55,631 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 03:58:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:59,058 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-03 03:58:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:58:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) Word has length 21 [2022-11-03 03:58:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:59,060 INFO L225 Difference]: With dead ends: 57 [2022-11-03 03:58:59,060 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 03:58:59,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:58:59,062 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 85 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:59,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 50 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:58:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 03:58:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-11-03 03:58:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 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 03:58:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-03 03:58:59,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2022-11-03 03:58:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:59,066 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-03 03:58:59,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 03:58:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-03 03:58:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:58:59,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:59,067 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 03:58:59,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:58:59,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:58:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1566471782, now seen corresponding path program 4 times [2022-11-03 03:58:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:59,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12364932] [2022-11-03 03:58:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:59,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:59,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:58:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12364932] [2022-11-03 03:58:59,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12364932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:58:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294858101] [2022-11-03 03:58:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:58:59,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:59,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:59,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:58:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 03:58:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:59,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294858101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:59,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101765109] [2022-11-03 03:58:59,991 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:58:59,991 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:58:59,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:58:59,992 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:58:59,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:00,021 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 03:59:00,041 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 03:59:00,086 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 03:59:00,122 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 03:59:00,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:01,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1330#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:01,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:01,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:01,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-03 03:59:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559866554] [2022-11-03 03:59:01,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:59:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:59:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:59:01,865 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:02,150 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-03 03:59:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:59:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 03:59:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:02,150 INFO L225 Difference]: With dead ends: 46 [2022-11-03 03:59:02,151 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 03:59:02,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:59:02,152 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:02,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 128 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:59:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 03:59:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-03 03:59:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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 03:59:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-03 03:59:02,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2022-11-03 03:59:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-03 03:59:02,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-03 03:59:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:59:02,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:02,157 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 03:59:02,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:02,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:59:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1232243396, now seen corresponding path program 5 times [2022-11-03 03:59:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388990438] [2022-11-03 03:59:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:03,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388990438] [2022-11-03 03:59:03,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388990438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072857974] [2022-11-03 03:59:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:59:03,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:03,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:03,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:59:03,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:59:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:59:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:59:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:03,487 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 03:59:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:59:04,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:59:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072857974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011020704] [2022-11-03 03:59:06,756 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:59:06,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:06,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:06,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:06,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:06,784 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 03:59:06,806 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 03:59:06,852 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 03:59:06,877 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 03:59:07,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:09,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1635#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:09,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:09,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:09,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-03 03:59:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038813865] [2022-11-03 03:59:09,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:09,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 03:59:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 03:59:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 03:59:09,173 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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 03:59:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:20,974 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-11-03 03:59:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-03 03:59:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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 27 [2022-11-03 03:59:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:20,975 INFO L225 Difference]: With dead ends: 111 [2022-11-03 03:59:20,975 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 03:59:20,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1761, Invalid=15795, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 03:59:20,981 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 286 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:20,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 53 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 03:59:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 03:59:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 42. [2022-11-03 03:59:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-03 03:59:20,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 27 [2022-11-03 03:59:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:20,986 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-03 03:59:20,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 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 03:59:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-03 03:59:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:59:20,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:20,987 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 1, 1, 1, 1] [2022-11-03 03:59:21,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:21,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:59:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1976534837, now seen corresponding path program 6 times [2022-11-03 03:59:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:21,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306692939] [2022-11-03 03:59:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:59:21,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306692939] [2022-11-03 03:59:21,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306692939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130188611] [2022-11-03 03:59:21,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:59:21,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:21,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:21,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:21,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:59:21,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:59:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:59:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:59:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:21,654 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 03:59:21,890 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 13 treesize of output 9 [2022-11-03 03:59:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 81 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:22,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 86 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130188611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:22,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567012555] [2022-11-03 03:59:22,536 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:59:22,536 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:22,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:22,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:22,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:22,556 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 03:59:22,593 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 03:59:22,633 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 03:59:22,651 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 03:59:22,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:24,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2227#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:24,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:24,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:24,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 40 [2022-11-03 03:59:24,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72191662] [2022-11-03 03:59:24,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 03:59:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:24,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 03:59:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2162, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 03:59:24,481 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:26,363 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-11-03 03:59:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:59:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:59:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:26,364 INFO L225 Difference]: With dead ends: 92 [2022-11-03 03:59:26,364 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 03:59:26,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 03:59:26,366 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 121 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:26,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 98 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:59:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 03:59:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-03 03:59:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-11-03 03:59:26,370 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2022-11-03 03:59:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:26,370 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-11-03 03:59:26,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-11-03 03:59:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:59:26,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:26,372 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-03 03:59:26,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:26,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:59:26,587 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:59:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190366, now seen corresponding path program 7 times [2022-11-03 03:59:26,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:26,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719093443] [2022-11-03 03:59:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:26,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:27,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719093443] [2022-11-03 03:59:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719093443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:27,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995745422] [2022-11-03 03:59:27,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:59:27,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:27,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:27,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:59:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:59:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:27,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995745422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:28,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355903801] [2022-11-03 03:59:28,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:59:28,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:28,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:28,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:28,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:28,064 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 03:59:28,092 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 03:59:28,134 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 03:59:28,156 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 03:59:28,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:30,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2741#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:30,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:30,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:30,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2022-11-03 03:59:30,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690056370] [2022-11-03 03:59:30,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:30,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 03:59:30,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 03:59:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:59:30,112 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:30,958 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-03 03:59:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:59:30,959 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 03:59:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:30,959 INFO L225 Difference]: With dead ends: 80 [2022-11-03 03:59:30,959 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:59:30,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=217, Invalid=3323, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:59:30,961 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:30,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 554 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:59:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:59:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-11-03 03:59:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 03:59:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-11-03 03:59:30,965 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-11-03 03:59:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:30,965 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-11-03 03:59:30,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-11-03 03:59:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 03:59:30,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:30,966 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1] [2022-11-03 03:59:30,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:31,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:59:31,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 03:59:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash -598091279, now seen corresponding path program 8 times [2022-11-03 03:59:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228366606] [2022-11-03 03:59:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:32,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228366606] [2022-11-03 03:59:32,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228366606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452608458] [2022-11-03 03:59:32,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:59:32,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:32,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:32,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:32,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:59:33,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 03:59:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:59:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 03:59:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:33,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 03:59:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:59:36,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 113 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:59:41,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452608458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75028082] [2022-11-03 03:59:41,156 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:59:41,156 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:41,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:41,156 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:41,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:41,190 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 03:59:41,233 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 03:59:41,273 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 03:59:41,304 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 03:59:41,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:59:44,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3273#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 03:59:44,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:59:44,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:59:44,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 26] total 76 [2022-11-03 03:59:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487176004] [2022-11-03 03:59:44,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-03 03:59:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-03 03:59:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=6741, Unknown=0, NotChecked=0, Total=7310 [2022-11-03 03:59:44,343 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 78 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 77 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:00:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:01,935 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-11-03 04:00:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-03 04:00:01,936 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 77 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 04:00:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:01,937 INFO L225 Difference]: With dead ends: 112 [2022-11-03 04:00:01,937 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 04:00:01,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6276 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=2366, Invalid=27390, Unknown=0, NotChecked=0, Total=29756 [2022-11-03 04:00:01,943 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 144 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:01,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 204 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 489 Invalid, 0 Unknown, 653 Unchecked, 0.5s Time] [2022-11-03 04:00:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 04:00:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2022-11-03 04:00:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-03 04:00:01,947 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 49 [2022-11-03 04:00:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:01,948 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-03 04:00:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 77 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 04:00:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-03 04:00:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 04:00:01,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:01,950 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 8, 8, 1, 1, 1, 1] [2022-11-03 04:00:01,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 04:00:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:02,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:00:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash 325654721, now seen corresponding path program 9 times [2022-11-03 04:00:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367938463] [2022-11-03 04:00:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:02,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 208 proven. 176 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 04:00:02,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:02,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367938463] [2022-11-03 04:00:02,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367938463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:02,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504453551] [2022-11-03 04:00:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:00:02,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:02,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:02,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 04:00:03,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:00:03,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:00:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:03,143 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 04:00:03,645 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 13 treesize of output 9 [2022-11-03 04:00:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 354 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:04,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 366 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504453551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:05,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695260549] [2022-11-03 04:00:05,433 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:00:05,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:05,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:05,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:05,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:05,451 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 04:00:05,484 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 04:00:05,520 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 04:00:05,542 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 04:00:05,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:07,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4177#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:00:07,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:00:07,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:00:07,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 66 [2022-11-03 04:00:07,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997721892] [2022-11-03 04:00:07,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:07,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 04:00:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 04:00:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5113, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 04:00:07,851 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 67 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 04:00:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:12,659 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2022-11-03 04:00:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 04:00:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 0 states have call successors, (0), 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 77 [2022-11-03 04:00:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:12,661 INFO L225 Difference]: With dead ends: 178 [2022-11-03 04:00:12,661 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 04:00:12,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2018, Invalid=12988, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 04:00:12,663 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 238 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:12,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 289 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:00:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 04:00:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-03 04:00:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 04:00:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-11-03 04:00:12,668 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 77 [2022-11-03 04:00:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:12,668 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-11-03 04:00:12,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 04:00:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-11-03 04:00:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 04:00:12,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:12,670 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1] [2022-11-03 04:00:12,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:12,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 04:00:12,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:00:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1811062437, now seen corresponding path program 10 times [2022-11-03 04:00:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746855871] [2022-11-03 04:00:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:14,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746855871] [2022-11-03 04:00:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746855871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020584410] [2022-11-03 04:00:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:00:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:14,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:14,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:00:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 04:00:15,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:15,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:17,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020584410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:17,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325437853] [2022-11-03 04:00:17,054 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:00:17,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:17,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:17,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:17,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:17,079 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 04:00:17,104 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 04:00:17,139 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 04:00:17,158 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 04:00:17,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:19,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5143#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:00:19,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:00:19,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:00:19,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 65 [2022-11-03 04:00:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522795947] [2022-11-03 04:00:19,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:19,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 04:00:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 04:00:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5202, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 04:00:19,633 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 66 states, 66 states have (on average 2.727272727272727) internal successors, (180), 65 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 04:00:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:22,337 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-11-03 04:00:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 04:00:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.727272727272727) internal successors, (180), 65 states have internal predecessors, (180), 0 states have call successors, (0), 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 89 [2022-11-03 04:00:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:22,338 INFO L225 Difference]: With dead ends: 150 [2022-11-03 04:00:22,338 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 04:00:22,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=371, Invalid=9931, Unknown=0, NotChecked=0, Total=10302 [2022-11-03 04:00:22,340 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:22,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1938 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:00:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 04:00:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-11-03 04:00:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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 04:00:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-11-03 04:00:22,345 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2022-11-03 04:00:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:22,345 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-11-03 04:00:22,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.727272727272727) internal successors, (180), 65 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 04:00:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-11-03 04:00:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:00:22,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:22,347 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1] [2022-11-03 04:00:22,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 04:00:22,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 04:00:22,575 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:00:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash 887345066, now seen corresponding path program 11 times [2022-11-03 04:00:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:22,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196020756] [2022-11-03 04:00:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:22,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:25,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196020756] [2022-11-03 04:00:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196020756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061006457] [2022-11-03 04:00:25,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:00:25,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:25,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:25,275 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:25,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 04:00:26,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-03 04:00:26,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-03 04:00:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:26,370 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 04:00:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 27 proven. 434 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 04:00:32,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 40 proven. 421 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 04:00:40,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061006457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846867952] [2022-11-03 04:00:40,357 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:00:40,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:40,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:40,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:40,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:40,381 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 04:00:40,430 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 04:00:40,466 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 04:00:40,489 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 04:00:40,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:44,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6109#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:00:44,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:00:44,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:00:44,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 41, 40] total 118 [2022-11-03 04:00:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283822904] [2022-11-03 04:00:44,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-11-03 04:00:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-11-03 04:00:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=15047, Unknown=0, NotChecked=0, Total=16256 [2022-11-03 04:00:44,012 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 120 states, 119 states have (on average 1.9075630252100841) internal successors, (227), 119 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:07,628 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2022-11-03 04:02:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-11-03 04:02:07,629 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.9075630252100841) internal successors, (227), 119 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:02:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,630 INFO L225 Difference]: With dead ends: 275 [2022-11-03 04:02:07,631 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 04:02:07,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22636 ImplicationChecksByTransitivity, 93.8s TimeCoverageRelationStatistics Valid=9987, Invalid=92733, Unknown=0, NotChecked=0, Total=102720 [2022-11-03 04:02:07,635 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 720 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 5004 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 6012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 5004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 678 Invalid, 6012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 5004 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 04:02:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 04:02:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 152. [2022-11-03 04:02:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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 04:02:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-11-03 04:02:07,642 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 91 [2022-11-03 04:02:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,642 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-11-03 04:02:07,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.9075630252100841) internal successors, (227), 119 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:07,643 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-11-03 04:02:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 04:02:07,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:07,645 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 15, 15, 1, 1, 1, 1] [2022-11-03 04:02:07,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:07,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 04:02:07,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:02:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash -599285638, now seen corresponding path program 12 times [2022-11-03 04:02:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:07,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427050237] [2022-11-03 04:02:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 870 proven. 645 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-11-03 04:02:09,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427050237] [2022-11-03 04:02:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427050237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092460746] [2022-11-03 04:02:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:02:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:09,763 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 04:02:10,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:02:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 04:02:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:10,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:02:11,230 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 13 treesize of output 9 [2022-11-03 04:02:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 1599 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 1626 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:16,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092460746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:16,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651025375] [2022-11-03 04:02:16,250 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:02:16,250 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:16,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:16,251 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:16,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:16,265 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 04:02:16,299 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 04:02:16,333 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 04:02:16,353 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 04:02:16,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:19,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7948#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:19,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:19,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:19,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 50, 50] total 117 [2022-11-03 04:02:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634193256] [2022-11-03 04:02:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-03 04:02:19,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-03 04:02:19,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1422, Invalid=14328, Unknown=0, NotChecked=0, Total=15750 [2022-11-03 04:02:19,422 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 118 states, 118 states have (on average 2.830508474576271) internal successors, (334), 117 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 04:02:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:34,282 INFO L93 Difference]: Finished difference Result 356 states and 369 transitions. [2022-11-03 04:02:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-03 04:02:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.830508474576271) internal successors, (334), 117 states have internal predecessors, (334), 0 states have call successors, (0), 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 151 [2022-11-03 04:02:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:34,284 INFO L225 Difference]: With dead ends: 356 [2022-11-03 04:02:34,284 INFO L226 Difference]: Without dead ends: 180 [2022-11-03 04:02:34,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 346 SyntacticMatches, 15 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11982 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=6838, Invalid=40468, Unknown=0, NotChecked=0, Total=47306 [2022-11-03 04:02:34,287 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 419 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 4441 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 4755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 4441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:34,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 824 Invalid, 4755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 4441 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 04:02:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-03 04:02:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-03 04:02:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-11-03 04:02:34,293 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 151 [2022-11-03 04:02:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:34,294 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-11-03 04:02:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.830508474576271) internal successors, (334), 117 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 04:02:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-11-03 04:02:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 04:02:34,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:34,297 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 1, 1, 1, 1] [2022-11-03 04:02:34,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:34,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:34,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:02:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1698249716, now seen corresponding path program 13 times [2022-11-03 04:02:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:34,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103430079] [2022-11-03 04:02:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 58 proven. 2465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:38,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103430079] [2022-11-03 04:02:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103430079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735180358] [2022-11-03 04:02:38,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:02:38,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:38,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:38,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:38,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 04:02:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-03 04:02:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 58 proven. 2465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:41,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 58 proven. 2465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735180358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372892149] [2022-11-03 04:02:47,236 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:02:47,236 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:47,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:47,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:47,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:47,263 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 04:02:47,284 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 04:02:47,332 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 04:02:47,375 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 04:02:47,595 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:50,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9870#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:50,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:50,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:50,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 125 [2022-11-03 04:02:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532132192] [2022-11-03 04:02:50,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-03 04:02:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-03 04:02:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=17472, Unknown=0, NotChecked=0, Total=17822 [2022-11-03 04:02:50,900 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 126 states, 126 states have (on average 2.857142857142857) internal successors, (360), 125 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 04:03:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:00,637 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2022-11-03 04:03:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-03 04:03:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.857142857142857) internal successors, (360), 125 states have internal predecessors, (360), 0 states have call successors, (0), 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 179 [2022-11-03 04:03:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:00,639 INFO L225 Difference]: With dead ends: 300 [2022-11-03 04:03:00,639 INFO L226 Difference]: Without dead ends: 183 [2022-11-03 04:03:00,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 464 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4723 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=701, Invalid=35971, Unknown=0, NotChecked=0, Total=36672 [2022-11-03 04:03:00,641 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 268 mSDsluCounter, 7358 mSDsCounter, 0 mSdLazyCounter, 7941 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 7400 SdHoareTripleChecker+Invalid, 8060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 7941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 7400 Invalid, 8060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 7941 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 04:03:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-03 04:03:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-11-03 04:03:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 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 04:03:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-11-03 04:03:00,646 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2022-11-03 04:03:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:00,646 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-11-03 04:03:00,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.857142857142857) internal successors, (360), 125 states have internal predecessors, (360), 0 states have call successors, (0), 0 states 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 04:03:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-11-03 04:03:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 04:03:00,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:00,652 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1] [2022-11-03 04:03:00,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:00,867 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-03 04:03:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash -100670053, now seen corresponding path program 14 times [2022-11-03 04:03:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471860347] [2022-11-03 04:03:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 0 proven. 2582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:08,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:03:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471860347] [2022-11-03 04:03:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471860347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:03:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455792831] [2022-11-03 04:03:08,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:08,314 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:08,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97378849-e628-49d0-99f6-7db97ba6dd7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 04:04:30,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-03 04:04:30,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-03 04:04:30,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:30,426 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 04:04:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 29 proven. 1741 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 04:04:50,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2582 backedges. 29 proven. 1741 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-11-03 04:05:16,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455792831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:16,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803427965] [2022-11-03 04:05:16,200 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 04:05:16,200 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:16,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:16,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:16,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:16,229 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 04:05:16,262 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 04:05:16,290 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 04:05:16,308 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 04:05:16,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:05:21,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11761#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_#in~c#1| 2147483647) (<= |ULTIMATE.start_cmemrchr_~s#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#in~s#1.base|) (= ~MAX~0 100000) (<= 0 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.offset|) (<= |ULTIMATE.start_cmemrchr_~n#1| 100000) (<= |ULTIMATE.start_main_~c~0#1| 2147483647) (or (not (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.offset|)) (not (<= (+ |ULTIMATE.start_cmemrchr_#t~pre3#1.offset| 1) (select |#length| |ULTIMATE.start_cmemrchr_#t~pre3#1.base|)))) (<= 0 |ULTIMATE.start_cmemrchr_~cp~0#1.base|) (<= 1 |ULTIMATE.start_cmemrchr_#in~n#1|) (<= 0 |ULTIMATE.start_main_#t~malloc8#1.base|) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 0 |ULTIMATE.start_cmemrchr_#t~pre3#1.base|) (<= 0 |ULTIMATE.start_cmemrchr_~s#1.base|) (<= 0 (+ |ULTIMATE.start_cmemrchr_~c#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cmemrchr_#in~n#1| 100000) (<= 0 (+ |ULTIMATE.start_main_~c~0#1| 2147483648)) (<= |ULTIMATE.start_cmemrchr_#in~s#1.offset| 0) (<= |ULTIMATE.start_cmemrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~nondetArea~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_cmemrchr_#in~c#1| 2147483648)) (<= |ULTIMATE.start_main_~n~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 04:05:21,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:05:21,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:05:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 203 [2022-11-03 04:05:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137396335] [2022-11-03 04:05:21,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:21,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-11-03 04:05:21,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-11-03 04:05:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3406, Invalid=41750, Unknown=0, NotChecked=0, Total=45156 [2022-11-03 04:05:21,859 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 205 states, 204 states have (on average 2.122549019607843) internal successors, (433), 204 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)