./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/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_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-b5237d8 [2022-11-22 00:07:36,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:07:36,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:07:36,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:07:36,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:07:36,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:07:36,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:07:36,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:07:36,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:07:36,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:07:36,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:07:36,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:07:36,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:07:36,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:07:36,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:07:36,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:07:36,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:07:36,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:07:36,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:07:36,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:07:36,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:07:36,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:07:36,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:07:36,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:07:36,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:07:36,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:07:36,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:07:36,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:07:36,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:07:36,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:07:36,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:07:36,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:07:36,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:07:36,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:07:36,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:07:36,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:07:36,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:07:36,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:07:36,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:07:36,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:07:36,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:07:36,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 00:07:36,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:07:36,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:07:36,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:07:36,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:07:36,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:07:36,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:07:36,263 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:07:36,263 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:07:36,264 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:07:36,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:07:36,265 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:07:36,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:07:36,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:07:36,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:07:36,266 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:07:36,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:07:36,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:07:36,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:07:36,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:07:36,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:07:36,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:07:36,269 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:07:36,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:07:36,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:07:36,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:07:36,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:07:36,270 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:07:36,271 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:07:36,271 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:07:36,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:07:36,272 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:07:36,272 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:07:36,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:07:36,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:07:36,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:07:36,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:07:36,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:07:36,274 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:07:36,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:07:36,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:07:36,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:07:36,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:07:36,275 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_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 [2022-11-22 00:07:36,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:07:36,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:07:36,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:07:36,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:07:36,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:07:36,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-22 00:07:39,723 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:07:40,033 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:07:40,034 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2022-11-22 00:07:40,045 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/data/726332b91/98b5cb42f083442b94d737ae557dce34/FLAGf995cb4f5 [2022-11-22 00:07:40,063 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/data/726332b91/98b5cb42f083442b94d737ae557dce34 [2022-11-22 00:07:40,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:07:40,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:07:40,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:07:40,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:07:40,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:07:40,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15353055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40, skipping insertion in model container [2022-11-22 00:07:40,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:07:40,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:07:40,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:07:40,389 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:07:40,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:07:40,492 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:07:40,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40 WrapperNode [2022-11-22 00:07:40,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:07:40,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:07:40,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:07:40,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:07:40,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,551 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-11-22 00:07:40,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:07:40,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:07:40,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:07:40,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:07:40,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,591 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:07:40,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:07:40,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:07:40,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:07:40,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (1/1) ... [2022-11-22 00:07:40,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:07:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:40,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:07:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:07:40,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:07:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:07:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:07:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:07:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:07:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:07:40,802 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:07:40,804 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:07:41,085 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:07:41,206 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:07:41,207 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:07:41,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:07:41 BoogieIcfgContainer [2022-11-22 00:07:41,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:07:41,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:07:41,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:07:41,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:07:41,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:07:40" (1/3) ... [2022-11-22 00:07:41,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6299ac6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:07:41, skipping insertion in model container [2022-11-22 00:07:41,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:07:40" (2/3) ... [2022-11-22 00:07:41,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6299ac6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:07:41, skipping insertion in model container [2022-11-22 00:07:41,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:07:41" (3/3) ... [2022-11-22 00:07:41,230 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2022-11-22 00:07:41,250 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:07:41,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-22 00:07:41,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:07:41,322 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;@78121f0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:07:41,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-22 00:07:41,328 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) [2022-11-22 00:07:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:07:41,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:41,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:07:41,337 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)] === [2022-11-22 00:07:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash 107409, now seen corresponding path program 1 times [2022-11-22 00:07:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:41,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886881580] [2022-11-22 00:07:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:41,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:41,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886881580] [2022-11-22 00:07:41,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886881580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:41,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:41,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:07:41,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478071576] [2022-11-22 00:07:41,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:41,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:07:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:41,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:07:41,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:07:41,652 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) [2022-11-22 00:07:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:41,711 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-22 00:07:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 00:07:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:41,732 INFO L225 Difference]: With dead ends: 16 [2022-11-22 00:07:41,733 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 00:07:41,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:07:41,738 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:41,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:07:41,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 00:07:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 00:07:41,764 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) [2022-11-22 00:07:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 00:07:41,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 3 [2022-11-22 00:07:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:41,767 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 00:07:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 00:07:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 00:07:41,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:41,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 00:07:41,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:07:41,769 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)] === [2022-11-22 00:07:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash 107410, now seen corresponding path program 1 times [2022-11-22 00:07:41,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:41,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123071108] [2022-11-22 00:07:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:42,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:42,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123071108] [2022-11-22 00:07:42,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123071108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:42,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:42,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:07:42,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539485838] [2022-11-22 00:07:42,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:42,192 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) [2022-11-22 00:07:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:42,251 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-22 00:07:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:07:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 00:07:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:42,253 INFO L225 Difference]: With dead ends: 28 [2022-11-22 00:07:42,253 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 00:07:42,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:07:42,255 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:42,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:07:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 00:07:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2022-11-22 00:07:42,259 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) [2022-11-22 00:07:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-22 00:07:42,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 3 [2022-11-22 00:07:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-22 00:07:42,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-22 00:07:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:07:42,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:42,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-22 00:07:42,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:07:42,263 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)] === [2022-11-22 00:07:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 103264033, now seen corresponding path program 1 times [2022-11-22 00:07:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340858152] [2022-11-22 00:07:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:42,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:42,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340858152] [2022-11-22 00:07:42,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340858152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230739894] [2022-11-22 00:07:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:42,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:42,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:42,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:42,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:07:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 00:07:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:42,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:43,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:43,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230739894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450257148] [2022-11-22 00:07:43,296 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-22 00:07:43,296 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:43,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:43,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:43,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:43,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:43,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:07:43,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:43,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:43,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:44,154 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 [2022-11-22 00:07:44,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:44,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:44,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 00:07:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169494959] [2022-11-22 00:07:44,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:44,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:07:44,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:07:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:07:44,159 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) [2022-11-22 00:07:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:44,340 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-22 00:07:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:07:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 00:07:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:44,342 INFO L225 Difference]: With dead ends: 16 [2022-11-22 00:07:44,342 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:07:44,343 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 [2022-11-22 00:07:44,344 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 30 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 [2022-11-22 00:07:44,344 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] [2022-11-22 00:07:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:07:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-22 00:07:44,347 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) [2022-11-22 00:07:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 00:07:44,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2022-11-22 00:07:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:44,348 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 00:07:44,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:07:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 00:07:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:07:44,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:44,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:44,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:44,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:44,550 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)] === [2022-11-22 00:07:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash 454107511, now seen corresponding path program 1 times [2022-11-22 00:07:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:44,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514054039] [2022-11-22 00:07:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:44,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:44,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514054039] [2022-11-22 00:07:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514054039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:44,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:07:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556624304] [2022-11-22 00:07:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:07:44,659 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) [2022-11-22 00:07:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:44,733 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2022-11-22 00:07:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:07:44,734 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 [2022-11-22 00:07:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:44,735 INFO L225 Difference]: With dead ends: 16 [2022-11-22 00:07:44,735 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 00:07:44,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:07:44,739 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:44,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:07:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 00:07:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-22 00:07:44,748 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) [2022-11-22 00:07:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-22 00:07:44,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-11-22 00:07:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-22 00:07:44,750 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) [2022-11-22 00:07:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-22 00:07:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:07:44,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:44,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:07:44,753 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)] === [2022-11-22 00:07:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 454107512, now seen corresponding path program 1 times [2022-11-22 00:07:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:44,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322877391] [2022-11-22 00:07:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:45,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:45,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322877391] [2022-11-22 00:07:45,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322877391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903124301] [2022-11-22 00:07:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:45,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:45,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:45,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:07:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 00:07:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:45,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:45,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903124301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:45,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922319666] [2022-11-22 00:07:45,883 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 00:07:45,883 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:45,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:45,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:45,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:45,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:45,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:46,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:46,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:46,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:47,326 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 [2022-11-22 00:07:47,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:47,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:47,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-22 00:07:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986130105] [2022-11-22 00:07:47,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:47,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 00:07:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 00:07:47,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:07:47,328 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) [2022-11-22 00:07:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:48,122 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-22 00:07:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 00:07:48,123 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 [2022-11-22 00:07:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:48,124 INFO L225 Difference]: With dead ends: 62 [2022-11-22 00:07:48,124 INFO L226 Difference]: Without dead ends: 62 [2022-11-22 00:07:48,125 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 [2022-11-22 00:07:48,125 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 140 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:48,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 92 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:07:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-22 00:07:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 24. [2022-11-22 00:07:48,132 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) [2022-11-22 00:07:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-22 00:07:48,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 7 [2022-11-22 00:07:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:48,135 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-22 00:07:48,135 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) [2022-11-22 00:07:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-22 00:07:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 00:07:48,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:48,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:48,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:48,342 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)] === [2022-11-22 00:07:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash -502521436, now seen corresponding path program 1 times [2022-11-22 00:07:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:48,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979157130] [2022-11-22 00:07:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:07:48,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979157130] [2022-11-22 00:07:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979157130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:48,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:07:48,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:07:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815257631] [2022-11-22 00:07:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:07:48,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:07:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:48,431 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) [2022-11-22 00:07:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:48,445 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2022-11-22 00:07:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:07:48,445 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 [2022-11-22 00:07:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:48,447 INFO L225 Difference]: With dead ends: 23 [2022-11-22 00:07:48,447 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 00:07:48,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:07:48,448 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 9 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 [2022-11-22 00:07:48,448 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] [2022-11-22 00:07:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 00:07:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-22 00:07:48,451 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) [2022-11-22 00:07:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-22 00:07:48,451 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2022-11-22 00:07:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:48,452 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-22 00:07:48,452 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) [2022-11-22 00:07:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-22 00:07:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:07:48,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:48,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:07:48,453 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)] === [2022-11-22 00:07:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 37291176, now seen corresponding path program 1 times [2022-11-22 00:07:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:48,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010045244] [2022-11-22 00:07:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:48,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010045244] [2022-11-22 00:07:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010045244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995782561] [2022-11-22 00:07:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:48,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:48,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:48,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:07:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:07:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995782561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312815695] [2022-11-22 00:07:48,829 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:07:48,829 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:48,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:48,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:48,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:48,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:48,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:07:48,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:49,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:49,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:51,017 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 [2022-11-22 00:07:51,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:51,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:51,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-11-22 00:07:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652722848] [2022-11-22 00:07:51,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:07:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:07:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:07:51,020 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) [2022-11-22 00:07:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:51,110 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-11-22 00:07:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:07:51,112 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 [2022-11-22 00:07:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:51,112 INFO L225 Difference]: With dead ends: 24 [2022-11-22 00:07:51,112 INFO L226 Difference]: Without dead ends: 19 [2022-11-22 00:07:51,113 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 [2022-11-22 00:07:51,113 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:51,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 39 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:07:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-22 00:07:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-22 00:07:51,115 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) [2022-11-22 00:07:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-22 00:07:51,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-22 00:07:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:51,116 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-22 00:07:51,117 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) [2022-11-22 00:07:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-22 00:07:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:07:51,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:51,117 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:07:51,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:51,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:07:51,318 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)] === [2022-11-22 00:07:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1191886437, now seen corresponding path program 2 times [2022-11-22 00:07:51,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:51,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120023518] [2022-11-22 00:07:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:51,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:51,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:51,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120023518] [2022-11-22 00:07:51,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120023518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:51,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391692148] [2022-11-22 00:07:51,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:07:51,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:51,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:51,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:07:51,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 00:07:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:07:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 00:07:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:51,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:07:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:07:52,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:07:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391692148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:07:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:07:52,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-11-22 00:07:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853654292] [2022-11-22 00:07:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:07:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:07:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:07:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:07:52,253 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) [2022-11-22 00:07:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:07:52,463 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-11-22 00:07:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:07:52,464 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 [2022-11-22 00:07:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:07:52,465 INFO L225 Difference]: With dead ends: 22 [2022-11-22 00:07:52,465 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 00:07:52,465 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 [2022-11-22 00:07:52,466 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:07:52,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:07:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 00:07:52,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2022-11-22 00:07:52,468 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) [2022-11-22 00:07:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-22 00:07:52,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2022-11-22 00:07:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:07:52,468 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-22 00:07:52,469 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) [2022-11-22 00:07:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-22 00:07:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:07:52,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:07:52,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:07:52,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:07:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 00:07:52,675 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)] === [2022-11-22 00:07:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:07:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1163792695, now seen corresponding path program 2 times [2022-11-22 00:07:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:07:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003125484] [2022-11-22 00:07:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:07:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:07:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:07:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:07:53,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:07:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003125484] [2022-11-22 00:07:53,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003125484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:07:53,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991353452] [2022-11-22 00:07:53,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:07:53,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:07:53,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:07:53,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:07:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:07:53,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:07:53,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:07:53,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 00:07:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:07:53,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:07:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:07:54,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:07:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:07:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991353452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:07:55,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017173126] [2022-11-22 00:07:55,143 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:07:55,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:07:55,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:07:55,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:07:55,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:07:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:07:55,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:55,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:55,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:07:55,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:07:57,528 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 [2022-11-22 00:07:57,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:07:57,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:07:57,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-11-22 00:07:57,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826937335] [2022-11-22 00:07:57,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:07:57,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 00:07:57,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:07:57,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 00:07:57,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 00:07:57,530 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) [2022-11-22 00:08:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:01,178 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-11-22 00:08:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 00:08:01,179 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 [2022-11-22 00:08:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:01,180 INFO L225 Difference]: With dead ends: 41 [2022-11-22 00:08:01,180 INFO L226 Difference]: Without dead ends: 41 [2022-11-22 00:08:01,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 00:08:01,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:01,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:08:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-22 00:08:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2022-11-22 00:08:01,185 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) [2022-11-22 00:08:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-22 00:08:01,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 13 [2022-11-22 00:08:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:01,186 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-22 00:08:01,186 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) [2022-11-22 00:08:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-22 00:08:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 00:08:01,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:01,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-22 00:08:01,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:01,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:01,396 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)] === [2022-11-22 00:08:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash 542675095, now seen corresponding path program 3 times [2022-11-22 00:08:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:01,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35488740] [2022-11-22 00:08:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:08:01,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35488740] [2022-11-22 00:08:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35488740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633798672] [2022-11-22 00:08:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:08:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:01,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:01,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:08:01,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:08:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:08:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-22 00:08:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:01,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:08:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:02,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:03,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633798672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949285353] [2022-11-22 00:08:03,207 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:03,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:03,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:03,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:03,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:03,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:03,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:08:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:03,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:05,552 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 [2022-11-22 00:08:05,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:05,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:05,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 28 [2022-11-22 00:08:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338576519] [2022-11-22 00:08:05,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 00:08:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 00:08:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:08:05,555 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) [2022-11-22 00:08:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:09,123 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-11-22 00:08:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 00:08:09,124 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 [2022-11-22 00:08:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:09,124 INFO L225 Difference]: With dead ends: 57 [2022-11-22 00:08:09,124 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 00:08:09,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:08:09,127 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 111 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:09,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 50 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:08:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 00:08:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2022-11-22 00:08:09,130 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) [2022-11-22 00:08:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-22 00:08:09,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2022-11-22 00:08:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:09,131 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-22 00:08:09,131 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) [2022-11-22 00:08:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-22 00:08:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 00:08:09,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:09,132 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-22 00:08:09,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:09,338 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)] === [2022-11-22 00:08:09,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:09,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1566471782, now seen corresponding path program 4 times [2022-11-22 00:08:09,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:09,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653502491] [2022-11-22 00:08:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:09,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:09,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:09,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653502491] [2022-11-22 00:08:09,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653502491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:09,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500708773] [2022-11-22 00:08:09,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:08:09,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:09,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:09,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:08:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:09,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:08:09,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:10,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500708773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571916744] [2022-11-22 00:08:10,094 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:10,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:10,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:10,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:10,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:10,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:08:10,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:10,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:10,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:12,087 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 [2022-11-22 00:08:12,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:12,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:12,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-22 00:08:12,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364677673] [2022-11-22 00:08:12,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:12,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 00:08:12,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 00:08:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-11-22 00:08:12,090 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) [2022-11-22 00:08:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:12,387 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-22 00:08:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:08:12,388 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 [2022-11-22 00:08:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:12,388 INFO L225 Difference]: With dead ends: 46 [2022-11-22 00:08:12,388 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 00:08:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:08:12,391 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:12,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:08:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 00:08:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-22 00:08:12,394 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) [2022-11-22 00:08:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-22 00:08:12,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2022-11-22 00:08:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:12,395 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-22 00:08:12,395 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) [2022-11-22 00:08:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-22 00:08:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:08:12,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:12,396 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-22 00:08:12,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:12,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:12,606 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)] === [2022-11-22 00:08:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:12,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1232243396, now seen corresponding path program 5 times [2022-11-22 00:08:12,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:12,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400333796] [2022-11-22 00:08:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:12,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:13,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400333796] [2022-11-22 00:08:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400333796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737508970] [2022-11-22 00:08:13,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:08:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:13,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:13,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:08:13,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 00:08:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:08:13,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 00:08:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:13,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:08:15,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:08:17,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737508970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3167989] [2022-11-22 00:08:17,441 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:17,441 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:17,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:17,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:17,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:17,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:17,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:08:17,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:17,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:17,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:19,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1637#(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 [2022-11-22 00:08:19,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:19,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 50 [2022-11-22 00:08:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117555547] [2022-11-22 00:08:19,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:19,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-22 00:08:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-22 00:08:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:08:19,980 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:30,707 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-11-22 00:08:30,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-22 00:08:30,708 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2022-11-22 00:08:30,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:30,709 INFO L225 Difference]: With dead ends: 111 [2022-11-22 00:08:30,709 INFO L226 Difference]: Without dead ends: 111 [2022-11-22 00:08:30,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1809, Invalid=15221, Unknown=0, NotChecked=0, Total=17030 [2022-11-22 00:08:30,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 300 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:30,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 71 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:08:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-22 00:08:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 42. [2022-11-22 00:08:30,718 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) [2022-11-22 00:08:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-22 00:08:30,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 27 [2022-11-22 00:08:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:30,719 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-22 00:08:30,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-22 00:08:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:08:30,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:30,720 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 1, 1, 1, 1] [2022-11-22 00:08:30,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:30,923 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)] === [2022-11-22 00:08:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1976534837, now seen corresponding path program 6 times [2022-11-22 00:08:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547087788] [2022-11-22 00:08:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:30,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:08:31,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:31,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547087788] [2022-11-22 00:08:31,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547087788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:31,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54419002] [2022-11-22 00:08:31,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:08:31,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:31,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:31,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:31,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:08:31,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:08:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:08:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-22 00:08:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:31,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:08:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 44 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:08:32,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:34,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54419002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:34,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350366340] [2022-11-22 00:08:34,204 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:34,204 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:34,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:34,205 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:34,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:34,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:34,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:08:34,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:34,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:34,561 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:36,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2225#(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 [2022-11-22 00:08:36,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:36,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:36,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 18] total 44 [2022-11-22 00:08:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412154842] [2022-11-22 00:08:36,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:36,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 00:08:36,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 00:08:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:08:36,470 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:44,347 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2022-11-22 00:08:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 00:08:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-22 00:08:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:44,349 INFO L225 Difference]: With dead ends: 105 [2022-11-22 00:08:44,349 INFO L226 Difference]: Without dead ends: 88 [2022-11-22 00:08:44,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=983, Invalid=7389, Unknown=0, NotChecked=0, Total=8372 [2022-11-22 00:08:44,352 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 171 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:44,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 119 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:08:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-22 00:08:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2022-11-22 00:08:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-11-22 00:08:44,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 41 [2022-11-22 00:08:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:44,358 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-11-22 00:08:44,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-11-22 00:08:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 00:08:44,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:44,360 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-22 00:08:44,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 00:08:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:44,566 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)] === [2022-11-22 00:08:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1358190366, now seen corresponding path program 7 times [2022-11-22 00:08:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:44,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785223110] [2022-11-22 00:08:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:45,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785223110] [2022-11-22 00:08:45,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785223110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297063318] [2022-11-22 00:08:45,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:08:45,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:45,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:45,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:45,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:08:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 00:08:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:45,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:46,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297063318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:46,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [461992361] [2022-11-22 00:08:46,049 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:46,049 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:46,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:46,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:46,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:46,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:46,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:08:46,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:46,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:46,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:48,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2787#(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 [2022-11-22 00:08:48,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:48,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:48,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2022-11-22 00:08:48,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293038945] [2022-11-22 00:08:48,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:48,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 00:08:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 00:08:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1940, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 00:08:48,174 INFO L87 Difference]: Start difference. First operand 57 states and 62 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) [2022-11-22 00:08:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:49,115 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-11-22 00:08:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:08:49,115 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 [2022-11-22 00:08:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:49,116 INFO L225 Difference]: With dead ends: 158 [2022-11-22 00:08:49,116 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 00:08:49,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=217, Invalid=3323, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 00:08:49,118 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:49,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 685 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:08:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 00:08:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 57. [2022-11-22 00:08:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-22 00:08:49,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 47 [2022-11-22 00:08:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:49,123 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-22 00:08:49,123 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) [2022-11-22 00:08:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-22 00:08:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 00:08:49,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:49,125 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 1, 1, 1, 1] [2022-11-22 00:08:49,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:08:49,332 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)] === [2022-11-22 00:08:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1033465012, now seen corresponding path program 8 times [2022-11-22 00:08:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742580673] [2022-11-22 00:08:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 70 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 00:08:49,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742580673] [2022-11-22 00:08:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742580673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111434872] [2022-11-22 00:08:49,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:08:49,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:49,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:49,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:08:50,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-22 00:08:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:08:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 00:08:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 121 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:50,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:08:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 121 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111434872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:08:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561136620] [2022-11-22 00:08:51,583 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:08:51,583 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:08:51,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:08:51,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:08:51,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:08:51,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:51,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:51,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:51,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:08:51,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:08:53,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3357#(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 [2022-11-22 00:08:53,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:08:53,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:08:53,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 42 [2022-11-22 00:08:53,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609542506] [2022-11-22 00:08:53,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:08:53,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 00:08:53,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:08:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 00:08:53,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 00:08:53,596 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:08:55,285 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2022-11-22 00:08:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 00:08:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 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 [2022-11-22 00:08:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:08:55,286 INFO L225 Difference]: With dead ends: 109 [2022-11-22 00:08:55,286 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 00:08:55,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 98 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=735, Invalid=4965, Unknown=0, NotChecked=0, Total=5700 [2022-11-22 00:08:55,289 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:08:55,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 269 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 00:08:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 00:08:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-22 00:08:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-11-22 00:08:55,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2022-11-22 00:08:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:08:55,293 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-11-22 00:08:55,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:08:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-11-22 00:08:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 00:08:55,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:08:55,295 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 1, 1, 1, 1] [2022-11-22 00:08:55,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:08:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:08:55,501 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)] === [2022-11-22 00:08:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:08:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -287308992, now seen corresponding path program 9 times [2022-11-22 00:08:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:08:55,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460107903] [2022-11-22 00:08:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:08:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:08:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:08:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:08:57,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:08:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460107903] [2022-11-22 00:08:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460107903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:08:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123898604] [2022-11-22 00:08:57,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:08:57,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:08:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:08:57,066 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:08:57,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:08:57,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:08:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:08:57,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 00:08:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:08:57,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:08:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:08:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:09:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:09:01,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123898604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:09:01,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012618939] [2022-11-22 00:09:01,453 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:09:01,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:09:01,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:09:01,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:09:01,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:09:01,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:09:01,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:01,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:01,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:01,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:09:04,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3940#(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 [2022-11-22 00:09:04,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:09:04,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:09:04,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 57 [2022-11-22 00:09:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381470015] [2022-11-22 00:09:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:09:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-22 00:09:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:09:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-22 00:09:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4108, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 00:09:04,046 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:09:13,415 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-11-22 00:09:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-22 00:09:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-22 00:09:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:09:13,425 INFO L225 Difference]: With dead ends: 137 [2022-11-22 00:09:13,426 INFO L226 Difference]: Without dead ends: 137 [2022-11-22 00:09:13,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2709 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1685, Invalid=14571, Unknown=0, NotChecked=0, Total=16256 [2022-11-22 00:09:13,428 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 624 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:09:13,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 440 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 00:09:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-22 00:09:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 63. [2022-11-22 00:09:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-22 00:09:13,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 51 [2022-11-22 00:09:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:09:13,444 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-22 00:09:13,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.413793103448276) internal successors, (140), 58 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-22 00:09:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 00:09:13,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:09:13,445 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1] [2022-11-22 00:09:13,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:09:13,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:09:13,646 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)] === [2022-11-22 00:09:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:09:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 118413473, now seen corresponding path program 10 times [2022-11-22 00:09:13,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:09:13,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539623597] [2022-11-22 00:09:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:09:13,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:09:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:09:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:09:14,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:09:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539623597] [2022-11-22 00:09:14,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539623597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:09:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887412389] [2022-11-22 00:09:14,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:09:14,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:09:14,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:09:14,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:09:14,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:09:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:09:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-22 00:09:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:09:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:09:14,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:09:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:09:15,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887412389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:09:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281871756] [2022-11-22 00:09:15,564 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:09:15,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:09:15,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:09:15,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:09:15,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:09:15,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:09:15,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:15,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:15,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:15,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:09:17,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4624#(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 [2022-11-22 00:09:17,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:09:17,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:09:17,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2022-11-22 00:09:17,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489912748] [2022-11-22 00:09:17,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:09:17,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-22 00:09:17,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:09:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-22 00:09:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2310, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 00:09:17,667 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:09:18,739 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-11-22 00:09:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 00:09:18,739 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 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 53 [2022-11-22 00:09:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:09:18,740 INFO L225 Difference]: With dead ends: 96 [2022-11-22 00:09:18,740 INFO L226 Difference]: Without dead ends: 63 [2022-11-22 00:09:18,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=239, Invalid=4051, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 00:09:18,741 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:09:18,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 743 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:09:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-22 00:09:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-22 00:09:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-11-22 00:09:18,744 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 53 [2022-11-22 00:09:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:09:18,745 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-11-22 00:09:18,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:09:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-11-22 00:09:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 00:09:18,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:09:18,746 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 1, 1, 1, 1] [2022-11-22 00:09:18,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:09:18,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:09:18,952 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)] === [2022-11-22 00:09:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:09:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1967223935, now seen corresponding path program 11 times [2022-11-22 00:09:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:09:18,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51809922] [2022-11-22 00:09:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:09:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:09:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:09:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:09:20,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:09:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51809922] [2022-11-22 00:09:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51809922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:09:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555299407] [2022-11-22 00:09:20,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:09:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:09:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:09:20,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:09:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:09:20,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-22 00:09:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:09:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-22 00:09:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:09:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:09:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 00:09:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:09:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 00:09:29,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555299407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:09:29,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152222007] [2022-11-22 00:09:29,889 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:09:29,890 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:09:29,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:09:29,890 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:09:29,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:09:29,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:09:29,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:29,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:30,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:09:30,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:09:33,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5239#(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 [2022-11-22 00:09:33,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:09:33,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:09:33,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 78 [2022-11-22 00:09:33,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129160426] [2022-11-22 00:09:33,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:09:33,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-22 00:09:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:09:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-22 00:09:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=7056, Unknown=0, NotChecked=0, Total=7656 [2022-11-22 00:09:33,047 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:26,891 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2022-11-22 00:10:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-22 00:10:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-22 00:10:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:26,893 INFO L225 Difference]: With dead ends: 241 [2022-11-22 00:10:26,893 INFO L226 Difference]: Without dead ends: 241 [2022-11-22 00:10:26,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16954 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=5980, Invalid=60842, Unknown=0, NotChecked=0, Total=66822 [2022-11-22 00:10:26,900 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1321 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:26,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 312 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-22 00:10:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-22 00:10:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 92. [2022-11-22 00:10:26,904 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) [2022-11-22 00:10:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-11-22 00:10:26,905 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 57 [2022-11-22 00:10:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:26,905 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-11-22 00:10:26,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.7848101265822784) internal successors, (141), 79 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-11-22 00:10:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-22 00:10:26,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:26,907 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 9, 9, 1, 1, 1, 1] [2022-11-22 00:10:26,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:27,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:10:27,113 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)] === [2022-11-22 00:10:27,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash 135676704, now seen corresponding path program 12 times [2022-11-22 00:10:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:27,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092055907] [2022-11-22 00:10:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 306 proven. 225 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-22 00:10:27,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092055907] [2022-11-22 00:10:27,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092055907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:27,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392734814] [2022-11-22 00:10:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:10:27,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:27,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:27,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:10:28,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:10:28,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-22 00:10:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:28,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:10:28,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:10:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 531 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 546 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:31,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392734814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141039467] [2022-11-22 00:10:31,049 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:10:31,049 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:31,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:31,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:31,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:31,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:10:31,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:10:31,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:10:31,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:10:31,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:33,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6538#(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 [2022-11-22 00:10:33,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:33,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:33,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 32] total 75 [2022-11-22 00:10:33,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090358632] [2022-11-22 00:10:33,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:33,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-22 00:10:33,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:33,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-22 00:10:33,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=6387, Unknown=0, NotChecked=0, Total=6972 [2022-11-22 00:10:33,722 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:39,761 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2022-11-22 00:10:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-22 00:10:39,762 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 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 [2022-11-22 00:10:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:39,762 INFO L225 Difference]: With dead ends: 212 [2022-11-22 00:10:39,763 INFO L226 Difference]: Without dead ends: 108 [2022-11-22 00:10:39,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 202 SyntacticMatches, 9 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4749 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2713, Invalid=16747, Unknown=0, NotChecked=0, Total=19460 [2022-11-22 00:10:39,765 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 305 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:39,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 356 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:10:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-22 00:10:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-22 00:10:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-11-22 00:10:39,769 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 91 [2022-11-22 00:10:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:39,769 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-11-22 00:10:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-11-22 00:10:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 00:10:39,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:39,771 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1] [2022-11-22 00:10:39,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:39,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:39,978 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)] === [2022-11-22 00:10:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -386654568, now seen corresponding path program 13 times [2022-11-22 00:10:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827812378] [2022-11-22 00:10:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:41,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827812378] [2022-11-22 00:10:41,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827812378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643039907] [2022-11-22 00:10:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:10:41,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:41,805 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:41,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:10:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:42,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-22 00:10:42,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:42,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:45,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643039907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918228206] [2022-11-22 00:10:45,358 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:10:45,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:45,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:45,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:45,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:45,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:10:45,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:10:45,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:10:45,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:10:45,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:48,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7691#(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 [2022-11-22 00:10:48,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:48,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:48,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-11-22 00:10:48,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920523472] [2022-11-22 00:10:48,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-22 00:10:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-22 00:10:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=6914, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 00:10:48,190 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:52,065 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-22 00:10:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-22 00:10:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 0 states have call successors, (0), 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 107 [2022-11-22 00:10:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:52,066 INFO L225 Difference]: With dead ends: 180 [2022-11-22 00:10:52,066 INFO L226 Difference]: Without dead ends: 111 [2022-11-22 00:10:52,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2022-11-22 00:10:52,067 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:52,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 2660 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 00:10:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-22 00:10:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-22 00:10:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-22 00:10:52,071 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-11-22 00:10:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:52,072 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-22 00:10:52,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.792207792207792) internal successors, (215), 76 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-22 00:10:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 00:10:52,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:52,074 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1] [2022-11-22 00:10:52,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-22 00:10:52,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:52,279 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)] === [2022-11-22 00:10:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash -304138457, now seen corresponding path program 14 times [2022-11-22 00:10:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651159036] [2022-11-22 00:10:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:55,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651159036] [2022-11-22 00:10:55,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651159036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:55,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857509581] [2022-11-22 00:10:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:10:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:55,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:55,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:10:58,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-22 00:10:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 175 conjunts are in the unsatisfiable core [2022-11-22 00:10:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:58,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:11:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 28 proven. 802 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 00:11:08,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:11:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 00:11:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857509581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:11:22,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157798735] [2022-11-22 00:11:22,098 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:11:22,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:11:22,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:11:22,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:11:22,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:11:22,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:11:22,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:11:22,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:11:22,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:11:22,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:11:26,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8850#(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 [2022-11-22 00:11:26,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:11:26,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:11:26,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 53, 47] total 143 [2022-11-22 00:11:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878758421] [2022-11-22 00:11:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:11:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-22 00:11:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:11:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-22 00:11:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=21743, Unknown=0, NotChecked=0, Total=23256 [2022-11-22 00:11:26,700 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:13:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:48,799 INFO L93 Difference]: Finished difference Result 329 states and 331 transitions. [2022-11-22 00:13:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2022-11-22 00:13:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-22 00:13:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:48,801 INFO L225 Difference]: With dead ends: 329 [2022-11-22 00:13:48,801 INFO L226 Difference]: Without dead ends: 329 [2022-11-22 00:13:48,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34000 ImplicationChecksByTransitivity, 158.3s TimeCoverageRelationStatistics Valid=13311, Invalid=133761, Unknown=0, NotChecked=0, Total=147072 [2022-11-22 00:13:48,808 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2005 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 7348 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 8123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 7348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:48,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2005 Valid, 1073 Invalid, 8123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 7348 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-11-22 00:13:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-22 00:13:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 182. [2022-11-22 00:13:48,813 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) [2022-11-22 00:13:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-11-22 00:13:48,814 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 109 [2022-11-22 00:13:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:48,814 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-11-22 00:13:48,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:13:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-11-22 00:13:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-22 00:13:48,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:48,817 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 18, 18, 1, 1, 1, 1] [2022-11-22 00:13:48,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 00:13:49,025 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-22 00:13:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2029502855, now seen corresponding path program 15 times [2022-11-22 00:13:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:49,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995080344] [2022-11-22 00:13:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 1260 proven. 936 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-22 00:13:51,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995080344] [2022-11-22 00:13:51,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995080344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374915390] [2022-11-22 00:13:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:13:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:51,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:51,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 00:13:56,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:13:56,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:13:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-22 00:13:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:56,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:13:57,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:13:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 2073 proven. 389 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-22 00:13:58,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:14:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 2094 proven. 368 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-22 00:14:02,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374915390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:14:02,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2071077764] [2022-11-22 00:14:02,521 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:14:02,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:14:02,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:14:02,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:14:02,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:14:02,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:14:02,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:14:02,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:14:02,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:14:02,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:14:06,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11026#(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 [2022-11-22 00:14:06,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:14:06,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:14:06,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 47, 47] total 114 [2022-11-22 00:14:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566427404] [2022-11-22 00:14:06,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:14:06,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-22 00:14:06,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-22 00:14:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=14101, Unknown=0, NotChecked=0, Total=15006 [2022-11-22 00:14:06,009 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 115 states, 115 states have (on average 2.643478260869565) internal successors, (304), 114 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:14:25,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:14:25,821 INFO L93 Difference]: Finished difference Result 356 states and 360 transitions. [2022-11-22 00:14:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-22 00:14:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.643478260869565) internal successors, (304), 114 states have internal predecessors, (304), 0 states have call successors, (0), 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 181 [2022-11-22 00:14:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:14:25,823 INFO L225 Difference]: With dead ends: 356 [2022-11-22 00:14:25,823 INFO L226 Difference]: Without dead ends: 192 [2022-11-22 00:14:25,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 442 SyntacticMatches, 18 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10169 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=5070, Invalid=38402, Unknown=0, NotChecked=0, Total=43472 [2022-11-22 00:14:25,827 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 625 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 5471 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 5471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:14:25,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 992 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 5471 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 00:14:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-22 00:14:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-22 00:14:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:14:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-11-22 00:14:25,833 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 181 [2022-11-22 00:14:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:14:25,834 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-11-22 00:14:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.643478260869565) internal successors, (304), 114 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:14:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-11-22 00:14:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-22 00:14:25,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:14:25,837 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 23, 23, 1, 1, 1, 1] [2022-11-22 00:14:25,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:14:26,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:14:26,046 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-22 00:14:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:14:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash 978048274, now seen corresponding path program 16 times [2022-11-22 00:14:26,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:14:26,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156769183] [2022-11-22 00:14:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:14:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:14:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 1150 proven. 1541 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-22 00:14:29,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:14:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156769183] [2022-11-22 00:14:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156769183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:14:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640003038] [2022-11-22 00:14:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:14:29,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:14:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:14:29,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:14:29,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:14:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:14:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-22 00:14:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:14:36,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:14:38,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:14:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 2349 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:14:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:14:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 2382 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:14:47,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640003038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:14:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318619407] [2022-11-22 00:14:47,541 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:14:47,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:14:47,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:14:47,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:14:47,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:14:47,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:14:47,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:14:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:14:47,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:14:47,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:14:51,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13048#(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 [2022-11-22 00:14:51,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:14:51,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:14:51,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 64, 64] total 153 [2022-11-22 00:14:51,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324021815] [2022-11-22 00:14:51,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:14:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-11-22 00:14:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:14:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-11-22 00:14:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=23870, Unknown=0, NotChecked=0, Total=26082 [2022-11-22 00:14:51,204 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 154 states, 154 states have (on average 2.792207792207792) internal successors, (430), 153 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:15:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:15:04,146 INFO L93 Difference]: Finished difference Result 448 states and 459 transitions. [2022-11-22 00:15:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-22 00:15:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.792207792207792) internal successors, (430), 153 states have internal predecessors, (430), 0 states have call successors, (0), 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 191 [2022-11-22 00:15:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:15:04,147 INFO L225 Difference]: With dead ends: 448 [2022-11-22 00:15:04,148 INFO L226 Difference]: Without dead ends: 216 [2022-11-22 00:15:04,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 438 SyntacticMatches, 23 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14380 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=8792, Invalid=53958, Unknown=0, NotChecked=0, Total=62750 [2022-11-22 00:15:04,152 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 507 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 8249 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 8344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 8249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:15:04,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1609 Invalid, 8344 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [95 Valid, 8249 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-22 00:15:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-22 00:15:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-11-22 00:15:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:15:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-11-22 00:15:04,158 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 191 [2022-11-22 00:15:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:15:04,158 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-11-22 00:15:04,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.792207792207792) internal successors, (430), 153 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:15:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-11-22 00:15:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-22 00:15:04,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:15:04,160 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 1, 1, 1, 1] [2022-11-22 00:15:04,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-22 00:15:04,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 00:15:04,367 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-22 00:15:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:15:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1063664198, now seen corresponding path program 17 times [2022-11-22 00:15:04,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:15:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700369314] [2022-11-22 00:15:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:15:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:15:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:15:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 70 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:15:10,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:15:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700369314] [2022-11-22 00:15:10,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700369314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:15:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292777655] [2022-11-22 00:15:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:15:10,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:15:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:15:10,271 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:15:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 00:20:51,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-11-22 00:20:51,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:20:51,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 148 conjunts are in the unsatisfiable core [2022-11-22 00:20:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 70 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:20:51,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:21:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 70 proven. 3605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:21:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292777655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:21:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542263169] [2022-11-22 00:21:01,587 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:21:01,587 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:21:01,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:21:01,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:21:01,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:21:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:21:01,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:21:01,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:21:01,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-22 00:21:01,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:21:05,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15331#(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 [2022-11-22 00:21:05,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:21:05,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:21:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 148 [2022-11-22 00:21:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030681331] [2022-11-22 00:21:05,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:21:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-11-22 00:21:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:21:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-11-22 00:21:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=24086, Unknown=0, NotChecked=0, Total=24492 [2022-11-22 00:21:05,838 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 149 states, 149 states have (on average 2.8926174496644297) internal successors, (431), 148 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:21:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:21:21,089 INFO L93 Difference]: Finished difference Result 360 states and 361 transitions. [2022-11-22 00:21:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-22 00:21:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.8926174496644297) internal successors, (431), 148 states have internal predecessors, (431), 0 states have call successors, (0), 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 215 [2022-11-22 00:21:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:21:21,091 INFO L225 Difference]: With dead ends: 360 [2022-11-22 00:21:21,091 INFO L226 Difference]: Without dead ends: 219 [2022-11-22 00:21:21,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 560 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6442 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=828, Invalid=50474, Unknown=0, NotChecked=0, Total=51302 [2022-11-22 00:21:21,094 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 285 mSDsluCounter, 12477 mSDsCounter, 0 mSdLazyCounter, 13266 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 12582 SdHoareTripleChecker+Invalid, 13303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 13266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:21:21,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 12582 Invalid, 13303 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 13266 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-22 00:21:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-22 00:21:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-11-22 00:21:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:21:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2022-11-22 00:21:21,099 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 215 [2022-11-22 00:21:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:21:21,100 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2022-11-22 00:21:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.8926174496644297) internal successors, (431), 148 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:21:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2022-11-22 00:21:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-22 00:21:21,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:21:21,101 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1] [2022-11-22 00:21:21,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 00:21:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:21:21,315 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-22 00:21:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:21:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -752746411, now seen corresponding path program 18 times [2022-11-22 00:21:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:21:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175477304] [2022-11-22 00:21:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:21:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:21:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:21:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3746 backedges. 0 proven. 3746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:21:31,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:21:31,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175477304] [2022-11-22 00:21:31,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175477304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:21:31,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136385914] [2022-11-22 00:21:31,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:21:31,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:21:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:21:31,557 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:21:31,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eee1670-6428-465a-9666-ed9570b5504f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 00:21:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:21:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:21:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 247 conjunts are in the unsatisfiable core [2022-11-22 00:21:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:21:32,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 00:21:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3746 backedges. 0 proven. 3746 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:21:41,848 INFO L328 TraceCheckSpWp]: Computing backward predicates...