./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur --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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- 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-38b53e6 [2022-11-25 22:13:16,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:13:16,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:13:16,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:13:16,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:13:16,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:13:16,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:13:16,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:13:16,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:13:16,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:13:16,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:13:16,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:13:16,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:13:16,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:13:16,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:13:16,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:13:16,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:13:16,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:13:16,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:13:16,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:13:16,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:13:16,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:13:16,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:13:16,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:13:16,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:13:16,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:13:16,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:13:16,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:13:16,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:13:16,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:13:16,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:13:16,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:13:16,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:13:16,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:13:16,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:13:16,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:13:16,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:13:16,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:13:16,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:13:16,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:13:16,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:13:16,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:13:16,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:13:16,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:13:16,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:13:16,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:13:16,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:13:16,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:13:16,223 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:13:16,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:13:16,223 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:13:16,223 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:13:16,225 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:13:16,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:13:16,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:13:16,225 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:13:16,226 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:13:16,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:13:16,226 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:13:16,226 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:13:16,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:13:16,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:13:16,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:13:16,228 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:13:16,228 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:13:16,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:13:16,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:13:16,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:13:16,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:13:16,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:13:16,230 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:13:16,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:13:16,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:13:16,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:13:16,231 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:13:16,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:13:16,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:13:16,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:16,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:13:16,232 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:13:16,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:13:16,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:13:16,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:13:16,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:13:16,234 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_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-11-25 22:13:16,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:13:16,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:13:16,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:13:16,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:13:16,599 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:13:16,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-25 22:13:19,579 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:13:19,889 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:13:19,890 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-25 22:13:19,896 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/data/5e177a507/14ba1a6155ee4101adf156c55486d7ce/FLAGfaf86e82b [2022-11-25 22:13:19,913 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/data/5e177a507/14ba1a6155ee4101adf156c55486d7ce [2022-11-25 22:13:19,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:13:19,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:13:19,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:19,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:13:19,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:13:19,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:19" (1/1) ... [2022-11-25 22:13:19,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5532e720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:19, skipping insertion in model container [2022-11-25 22:13:19,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:13:19" (1/1) ... [2022-11-25 22:13:19,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:13:19,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:13:20,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:20,180 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:13:20,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:13:20,220 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:13:20,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20 WrapperNode [2022-11-25 22:13:20,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:13:20,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:20,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:13:20,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:13:20,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,267 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-25 22:13:20,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:13:20,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:13:20,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:13:20,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:13:20,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,311 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:13:20,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:13:20,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:13:20,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:13:20,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (1/1) ... [2022-11-25 22:13:20,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:13:20,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:20,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:13:20,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:13:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:13:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:13:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:13:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:13:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:13:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:13:20,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:13:20,494 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:13:20,704 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:13:20,782 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:13:20,794 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 22:13:20,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:13:20 BoogieIcfgContainer [2022-11-25 22:13:20,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:13:20,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:13:20,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:13:20,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:13:20,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:13:19" (1/3) ... [2022-11-25 22:13:20,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bce51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:13:20, skipping insertion in model container [2022-11-25 22:13:20,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:13:20" (2/3) ... [2022-11-25 22:13:20,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bce51c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:13:20, skipping insertion in model container [2022-11-25 22:13:20,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:13:20" (3/3) ... [2022-11-25 22:13:20,814 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-11-25 22:13:20,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:13:20,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-25 22:13:20,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:13:20,961 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;@7a3db0b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:13:20,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-25 22:13:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) 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) [2022-11-25 22:13:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:13:20,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:20,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:13:20,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 3271901, now seen corresponding path program 1 times [2022-11-25 22:13:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82173875] [2022-11-25 22:13:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:21,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82173875] [2022-11-25 22:13:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82173875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:21,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:21,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791595915] [2022-11-25 22:13:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:13:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:13:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:21,356 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:21,466 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-25 22:13:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:13:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 22:13:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:21,482 INFO L225 Difference]: With dead ends: 37 [2022-11-25 22:13:21,483 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 22:13:21,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:21,491 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:21,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 22:13:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-25 22:13:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-25 22:13:21,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-25 22:13:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-25 22:13:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-25 22:13:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:13:21,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:21,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:13:21,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:13:21,536 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:21,537 INFO L85 PathProgramCache]: Analyzing trace with hash 3197824, now seen corresponding path program 1 times [2022-11-25 22:13:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201869] [2022-11-25 22:13:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:21,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:21,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201869] [2022-11-25 22:13:21,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:21,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:21,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123532486] [2022-11-25 22:13:21,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:21,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:13:21,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:13:21,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:21,696 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:21,753 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-25 22:13:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:13:21,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 22:13:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:21,755 INFO L225 Difference]: With dead ends: 37 [2022-11-25 22:13:21,755 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 22:13:21,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:21,757 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:21,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 22:13:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-25 22:13:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-25 22:13:21,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2022-11-25 22:13:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:21,763 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-25 22:13:21,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-25 22:13:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 22:13:21,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:21,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 22:13:21,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:13:21,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 3199854, now seen corresponding path program 1 times [2022-11-25 22:13:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:21,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171659680] [2022-11-25 22:13:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:21,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:21,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171659680] [2022-11-25 22:13:21,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171659680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:21,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:21,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:13:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487437118] [2022-11-25 22:13:21,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:21,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:13:21,866 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:21,939 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-25 22:13:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:13:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 22:13:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:21,941 INFO L225 Difference]: With dead ends: 42 [2022-11-25 22:13:21,941 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 22:13:21,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:13:21,943 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:21,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:21,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 22:13:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2022-11-25 22:13:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-25 22:13:21,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2022-11-25 22:13:21,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:21,949 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-25 22:13:21,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-25 22:13:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:13:21,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:21,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:13:21,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:13:21,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:21,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash 99132597, now seen corresponding path program 1 times [2022-11-25 22:13:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837657866] [2022-11-25 22:13:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:21,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:22,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837657866] [2022-11-25 22:13:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837657866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:22,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:22,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170438231] [2022-11-25 22:13:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:22,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:22,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:22,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:13:22,106 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:22,142 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-11-25 22:13:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:13:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:13:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:22,143 INFO L225 Difference]: With dead ends: 22 [2022-11-25 22:13:22,144 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 22:13:22,144 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 [2022-11-25 22:13:22,145 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:22,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:22,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 22:13:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-25 22:13:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-25 22:13:22,150 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2022-11-25 22:13:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:22,150 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-25 22:13:22,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-25 22:13:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:13:22,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:22,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:13:22,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:13:22,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash 99132598, now seen corresponding path program 1 times [2022-11-25 22:13:22,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:22,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540459743] [2022-11-25 22:13:22,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:22,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:22,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:22,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540459743] [2022-11-25 22:13:22,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540459743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:22,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:22,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:22,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825066271] [2022-11-25 22:13:22,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:22,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:13:22,254 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:22,325 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-25 22:13:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:13:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:13:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:22,326 INFO L225 Difference]: With dead ends: 35 [2022-11-25 22:13:22,327 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 22:13:22,327 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 [2022-11-25 22:13:22,328 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:22,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 22:13:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-11-25 22:13:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-25 22:13:22,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2022-11-25 22:13:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:22,333 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-25 22:13:22,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-25 22:13:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:13:22,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:22,334 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-25 22:13:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:13:22,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 777193832, now seen corresponding path program 1 times [2022-11-25 22:13:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:22,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886464654] [2022-11-25 22:13:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:22,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886464654] [2022-11-25 22:13:22,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886464654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:22,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692131371] [2022-11-25 22:13:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:22,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:22,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:22,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:22,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:13:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:13:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:22,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:22,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692131371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:22,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872999467] [2022-11-25 22:13:22,606 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:13:22,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:22,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:22,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:22,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:22,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:22,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:13:23,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:23,195 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 15 treesize of output 14 [2022-11-25 22:13:23,216 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:23,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1872999467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:23,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:23,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-25 22:13:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696402267] [2022-11-25 22:13:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:13:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:13:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:13:23,444 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:23,912 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-25 22:13:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:13:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:13:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:23,913 INFO L225 Difference]: With dead ends: 30 [2022-11-25 22:13:23,913 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 22:13:23,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:13:23,918 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:23,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 22:13:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-25 22:13:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 28 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) [2022-11-25 22:13:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-25 22:13:23,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2022-11-25 22:13:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:23,934 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-25 22:13:23,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-25 22:13:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:13:23,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:23,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-11-25 22:13:23,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:24,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:24,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1676794930, now seen corresponding path program 1 times [2022-11-25 22:13:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:24,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616138635] [2022-11-25 22:13:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:24,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:24,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616138635] [2022-11-25 22:13:24,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616138635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873286930] [2022-11-25 22:13:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:24,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:24,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:13:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:24,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:13:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:24,426 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:13:24,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:13:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:24,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873286930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955339640] [2022-11-25 22:13:24,604 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:13:24,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:24,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:24,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:24,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:24,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:24,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:24,683 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 15 treesize of output 14 [2022-11-25 22:13:24,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:24,992 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 15 treesize of output 14 [2022-11-25 22:13:25,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:25,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '491#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:25,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:25,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:25,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-25 22:13:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372903080] [2022-11-25 22:13:25,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:13:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:13:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:13:25,412 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:25,720 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-11-25 22:13:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:13:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:13:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:25,729 INFO L225 Difference]: With dead ends: 100 [2022-11-25 22:13:25,729 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 22:13:25,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:13:25,731 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:25,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 22:13:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 47. [2022-11-25 22:13:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.525) internal successors, (61), 46 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) [2022-11-25 22:13:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-25 22:13:25,736 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 8 [2022-11-25 22:13:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:25,737 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-25 22:13:25,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-25 22:13:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:13:25,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:25,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:25,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 22:13:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:25,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:25,939 INFO L85 PathProgramCache]: Analyzing trace with hash -725463176, now seen corresponding path program 1 times [2022-11-25 22:13:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754223860] [2022-11-25 22:13:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:25,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:13:25,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754223860] [2022-11-25 22:13:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754223860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:25,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:13:25,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:13:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873024471] [2022-11-25 22:13:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:13:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:13:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:25,997 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:26,016 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2022-11-25 22:13:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:13:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 22:13:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:26,024 INFO L225 Difference]: With dead ends: 45 [2022-11-25 22:13:26,024 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 22:13:26,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:13:26,026 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:26,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 22:13:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-25 22:13:26,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.475) internal successors, (59), 44 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) [2022-11-25 22:13:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-25 22:13:26,039 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 10 [2022-11-25 22:13:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:26,040 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-25 22:13:26,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-25 22:13:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:13:26,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:26,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:13:26,042 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash -725463175, now seen corresponding path program 1 times [2022-11-25 22:13:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:26,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459927567] [2022-11-25 22:13:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:26,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:13:26,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459927567] [2022-11-25 22:13:26,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459927567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:26,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489453930] [2022-11-25 22:13:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:26,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:26,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:26,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:13:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:13:26,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:26,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489453930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032465773] [2022-11-25 22:13:26,309 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 22:13:26,309 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:26,309 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:26,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:26,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:26,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:26,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:26,363 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 15 treesize of output 14 [2022-11-25 22:13:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:26,590 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 15 treesize of output 14 [2022-11-25 22:13:26,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:13:26,738 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 15 treesize of output 14 [2022-11-25 22:13:26,797 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 15 treesize of output 14 [2022-11-25 22:13:26,845 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 15 treesize of output 14 [2022-11-25 22:13:26,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:26,909 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 15 treesize of output 14 [2022-11-25 22:13:26,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:27,057 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 15 treesize of output 14 [2022-11-25 22:13:27,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:27,160 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 15 treesize of output 14 [2022-11-25 22:13:27,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:27,305 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 15 treesize of output 14 [2022-11-25 22:13:27,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:28,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:28,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:28,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:28,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-11-25 22:13:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812894810] [2022-11-25 22:13:28,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:28,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:13:28,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:13:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:13:28,024 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-11-25 22:13:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:28,222 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-25 22:13:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:13:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 10 [2022-11-25 22:13:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:28,223 INFO L225 Difference]: With dead ends: 48 [2022-11-25 22:13:28,224 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 22:13:28,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-11-25 22:13:28,225 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 67 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:28,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 6 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 22:13:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-25 22:13:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-25 22:13:28,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 10 [2022-11-25 22:13:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:28,228 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-25 22:13:28,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-11-25 22:13:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-25 22:13:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:13:28,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:28,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:28,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:28,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:13:28,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1174809817, now seen corresponding path program 1 times [2022-11-25 22:13:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:28,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71189651] [2022-11-25 22:13:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:13:28,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71189651] [2022-11-25 22:13:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71189651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747034891] [2022-11-25 22:13:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:28,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:28,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:28,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:13:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 22:13:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:28,783 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_25| Int) (v_ArrVal_101 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_25| 1))) (and (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_18| v_ArrVal_101) |v_ULTIMATE.start_main_~#b~0#1.base_25| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_25|) 0) (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_18|) 0)))) is different from true [2022-11-25 22:13:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:13:28,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:13:28,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747034891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:28,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:13:28,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-25 22:13:28,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091507464] [2022-11-25 22:13:28,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:28,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:28,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-25 22:13:28,786 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:28,810 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-11-25 22:13:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:13:28,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 22:13:28,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:28,812 INFO L225 Difference]: With dead ends: 47 [2022-11-25 22:13:28,812 INFO L226 Difference]: Without dead ends: 46 [2022-11-25 22:13:28,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-25 22:13:28,813 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:28,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-25 22:13:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-25 22:13:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-25 22:13:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-25 22:13:28,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 15 [2022-11-25 22:13:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:28,817 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-25 22:13:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-25 22:13:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 22:13:28,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:28,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:13:28,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:29,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:29,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2059371235, now seen corresponding path program 1 times [2022-11-25 22:13:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559571266] [2022-11-25 22:13:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:13:29,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559571266] [2022-11-25 22:13:29,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559571266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295366663] [2022-11-25 22:13:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:29,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:29,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:13:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:13:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:29,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:13:29,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:13:29,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:13:29,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-25 22:13:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:29,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:29,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 22:13:29,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 22:13:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:29,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295366663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:29,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148951420] [2022-11-25 22:13:29,576 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-25 22:13:29,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:29,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:29,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:29,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:29,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:29,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:29,652 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 10 treesize of output 9 [2022-11-25 22:13:29,806 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:29,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:29,897 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 15 treesize of output 14 [2022-11-25 22:13:29,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:13:30,030 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 10 treesize of output 9 [2022-11-25 22:13:30,088 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 15 treesize of output 14 [2022-11-25 22:13:30,147 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 15 treesize of output 14 [2022-11-25 22:13:30,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:30,204 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 10 treesize of output 9 [2022-11-25 22:13:30,282 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:30,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:30,341 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 15 treesize of output 14 [2022-11-25 22:13:30,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:30,388 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 15 treesize of output 14 [2022-11-25 22:13:30,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:30,528 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 15 treesize of output 14 [2022-11-25 22:13:30,653 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 22:13:30,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:30,690 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:31,656 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_26|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32)) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:31,656 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:31,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:31,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2022-11-25 22:13:31,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815301147] [2022-11-25 22:13:31,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:31,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:13:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:31,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:13:31,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:13:31,658 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:31,861 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-11-25 22:13:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:13:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 22:13:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:31,862 INFO L225 Difference]: With dead ends: 72 [2022-11-25 22:13:31,862 INFO L226 Difference]: Without dead ends: 72 [2022-11-25 22:13:31,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-11-25 22:13:31,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:31,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-25 22:13:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2022-11-25 22:13:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 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) [2022-11-25 22:13:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-25 22:13:31,871 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 16 [2022-11-25 22:13:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:31,872 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-25 22:13:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-25 22:13:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 22:13:31,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:31,873 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2022-11-25 22:13:31,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:13:32,074 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -26544458, now seen corresponding path program 2 times [2022-11-25 22:13:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:32,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454314223] [2022-11-25 22:13:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:32,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:13:32,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454314223] [2022-11-25 22:13:32,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454314223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082023864] [2022-11-25 22:13:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:32,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:32,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:32,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:13:32,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:13:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:13:32,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:32,290 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:13:32,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:13:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:13:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:13:32,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082023864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662323039] [2022-11-25 22:13:32,643 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:13:32,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:32,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:32,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:32,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:32,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:32,692 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 10 treesize of output 9 [2022-11-25 22:13:32,817 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:32,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:32,894 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 15 treesize of output 14 [2022-11-25 22:13:32,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:33,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:33,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:33,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-11-25 22:13:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759684430] [2022-11-25 22:13:33,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:33,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 22:13:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 22:13:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:13:33,478 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2022-11-25 22:13:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:34,008 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-25 22:13:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:13:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 22:13:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:34,009 INFO L225 Difference]: With dead ends: 70 [2022-11-25 22:13:34,009 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 22:13:34,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-11-25 22:13:34,010 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 86 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:34,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 20 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 22:13:34,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-11-25 22:13:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-25 22:13:34,018 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2022-11-25 22:13:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:34,019 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-25 22:13:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2022-11-25 22:13:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-25 22:13:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:13:34,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:34,020 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1] [2022-11-25 22:13:34,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:34,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1892592084, now seen corresponding path program 1 times [2022-11-25 22:13:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:34,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672913953] [2022-11-25 22:13:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:13:34,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672913953] [2022-11-25 22:13:34,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672913953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:34,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674198318] [2022-11-25 22:13:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:34,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:34,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:34,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:13:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:13:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:13:34,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:13:34,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674198318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:34,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669714576] [2022-11-25 22:13:34,461 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:34,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:34,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:34,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:34,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:34,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:34,501 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 15 treesize of output 14 [2022-11-25 22:13:34,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:34,681 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 15 treesize of output 14 [2022-11-25 22:13:34,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:13:34,798 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 15 treesize of output 14 [2022-11-25 22:13:34,854 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 15 treesize of output 14 [2022-11-25 22:13:34,903 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 15 treesize of output 14 [2022-11-25 22:13:34,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:34,952 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 10 treesize of output 9 [2022-11-25 22:13:35,039 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:35,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:35,094 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 15 treesize of output 14 [2022-11-25 22:13:35,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:35,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:13:35,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:35,285 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 15 treesize of output 14 [2022-11-25 22:13:35,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:35,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1682#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:35,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:35,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:35,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 22:13:35,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113656661] [2022-11-25 22:13:35,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:35,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 22:13:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 22:13:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:13:35,974 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:36,165 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-11-25 22:13:36,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:13:36,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 22:13:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:36,167 INFO L225 Difference]: With dead ends: 119 [2022-11-25 22:13:36,167 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 22:13:36,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:13:36,168 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:36,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 43 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 22:13:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2022-11-25 22:13:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 65 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-11-25 22:13:36,173 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 19 [2022-11-25 22:13:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:36,174 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-11-25 22:13:36,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-11-25 22:13:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:13:36,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:36,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1] [2022-11-25 22:13:36,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:36,381 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1892594115, now seen corresponding path program 1 times [2022-11-25 22:13:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970987613] [2022-11-25 22:13:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:13:36,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:36,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970987613] [2022-11-25 22:13:36,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970987613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:36,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105282463] [2022-11-25 22:13:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:36,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:36,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:13:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:13:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:13:36,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:13:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105282463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025550848] [2022-11-25 22:13:36,775 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:36,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:36,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:36,776 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:36,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:36,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:36,821 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 10 treesize of output 9 [2022-11-25 22:13:36,951 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:36,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:37,056 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 15 treesize of output 14 [2022-11-25 22:13:37,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:37,161 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 10 treesize of output 9 [2022-11-25 22:13:37,224 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 15 treesize of output 14 [2022-11-25 22:13:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:37,295 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 15 treesize of output 14 [2022-11-25 22:13:37,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:37,423 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 15 treesize of output 14 [2022-11-25 22:13:37,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:37,481 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 10 treesize of output 9 [2022-11-25 22:13:37,574 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:37,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:37,643 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 15 treesize of output 14 [2022-11-25 22:13:37,663 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:38,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2001#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (not (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1))) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:38,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:38,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:38,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 22:13:38,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809039490] [2022-11-25 22:13:38,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 22:13:38,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 22:13:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:13:38,081 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2022-11-25 22:13:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:38,252 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-11-25 22:13:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:13:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 19 [2022-11-25 22:13:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:38,253 INFO L225 Difference]: With dead ends: 66 [2022-11-25 22:13:38,253 INFO L226 Difference]: Without dead ends: 66 [2022-11-25 22:13:38,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:13:38,255 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:38,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 4 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-25 22:13:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-25 22:13:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-25 22:13:38,259 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 19 [2022-11-25 22:13:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:38,259 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-25 22:13:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2022-11-25 22:13:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-25 22:13:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 22:13:38,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:38,260 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1] [2022-11-25 22:13:38,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 22:13:38,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 22:13:38,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:38,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2119785853, now seen corresponding path program 2 times [2022-11-25 22:13:38,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:38,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434940499] [2022-11-25 22:13:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:38,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:38,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434940499] [2022-11-25 22:13:38,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434940499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:38,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191625725] [2022-11-25 22:13:38,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:38,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:38,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:38,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:13:38,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:13:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:13:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:38,825 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 9 treesize of output 11 [2022-11-25 22:13:38,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 22:13:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:39,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:13:39,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191625725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:39,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:13:39,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2022-11-25 22:13:39,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288490216] [2022-11-25 22:13:39,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:39,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:13:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:13:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:13:39,061 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:39,132 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-11-25 22:13:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:13:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-25 22:13:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:39,134 INFO L225 Difference]: With dead ends: 65 [2022-11-25 22:13:39,134 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 22:13:39,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:13:39,135 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:39,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 22:13:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-25 22:13:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-11-25 22:13:39,139 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 22 [2022-11-25 22:13:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:39,139 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-11-25 22:13:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-11-25 22:13:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:13:39,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:39,141 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 22:13:39,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:13:39,353 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash -934045657, now seen corresponding path program 1 times [2022-11-25 22:13:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:39,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599984147] [2022-11-25 22:13:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 22:13:39,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:39,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599984147] [2022-11-25 22:13:39,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599984147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:39,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519398615] [2022-11-25 22:13:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:39,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:13:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:13:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:39,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:39,782 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 25 treesize of output 21 [2022-11-25 22:13:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:39,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519398615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:39,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118821469] [2022-11-25 22:13:39,894 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 22:13:39,894 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:39,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:39,895 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:39,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:39,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:39,940 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 10 treesize of output 9 [2022-11-25 22:13:40,058 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:40,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:40,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:13:40,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:40,243 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 10 treesize of output 9 [2022-11-25 22:13:40,300 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 15 treesize of output 14 [2022-11-25 22:13:40,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:40,381 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 10 treesize of output 9 [2022-11-25 22:13:40,453 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:40,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:40,516 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 15 treesize of output 14 [2022-11-25 22:13:40,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:40,557 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 10 treesize of output 9 [2022-11-25 22:13:40,633 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:40,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:40,687 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 15 treesize of output 14 [2022-11-25 22:13:40,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:41,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2530#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:41,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:41,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:41,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-11-25 22:13:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491590342] [2022-11-25 22:13:41,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:41,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 22:13:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 22:13:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:13:41,254 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:41,440 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-11-25 22:13:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:13:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 22:13:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:41,442 INFO L225 Difference]: With dead ends: 97 [2022-11-25 22:13:41,442 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 22:13:41,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:13:41,443 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:41,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 35 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:13:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 22:13:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2022-11-25 22:13:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-11-25 22:13:41,447 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 28 [2022-11-25 22:13:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:41,447 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-11-25 22:13:41,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-11-25 22:13:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:13:41,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:41,449 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1] [2022-11-25 22:13:41,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:41,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:13:41,654 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:41,655 INFO L85 PathProgramCache]: Analyzing trace with hash -186959404, now seen corresponding path program 2 times [2022-11-25 22:13:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:41,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308458499] [2022-11-25 22:13:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:13:41,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:41,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308458499] [2022-11-25 22:13:41,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308458499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:41,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391312733] [2022-11-25 22:13:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:41,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:41,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:41,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:13:41,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:13:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:13:41,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 22:13:42,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-25 22:13:42,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391312733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:42,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574768411] [2022-11-25 22:13:42,418 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:42,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:42,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:42,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:42,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:42,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:42,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:42,458 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 10 treesize of output 9 [2022-11-25 22:13:42,579 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:42,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:42,673 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 15 treesize of output 14 [2022-11-25 22:13:42,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:42,767 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 10 treesize of output 9 [2022-11-25 22:13:42,829 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 15 treesize of output 14 [2022-11-25 22:13:42,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:42,905 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 15 treesize of output 14 [2022-11-25 22:13:42,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:43,053 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 15 treesize of output 14 [2022-11-25 22:13:43,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:43,134 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 15 treesize of output 14 [2022-11-25 22:13:43,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:43,277 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 15 treesize of output 14 [2022-11-25 22:13:43,306 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:44,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2914#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:44,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:44,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:44,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2022-11-25 22:13:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777812419] [2022-11-25 22:13:44,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:13:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:13:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:13:44,069 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:44,846 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2022-11-25 22:13:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:13:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-25 22:13:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:44,847 INFO L225 Difference]: With dead ends: 119 [2022-11-25 22:13:44,848 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 22:13:44,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=398, Invalid=1858, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:13:44,849 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 234 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:44,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 22 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 22:13:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2022-11-25 22:13:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 91 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-11-25 22:13:44,854 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 31 [2022-11-25 22:13:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:44,855 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-11-25 22:13:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-11-25 22:13:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 22:13:44,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:44,856 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 2, 2, 1, 1] [2022-11-25 22:13:44,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:45,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:13:45,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 486873334, now seen corresponding path program 1 times [2022-11-25 22:13:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358505017] [2022-11-25 22:13:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:45,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358505017] [2022-11-25 22:13:45,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358505017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:45,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955416051] [2022-11-25 22:13:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:45,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:45,268 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:13:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:13:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 22:13:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955416051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567151716] [2022-11-25 22:13:45,612 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:45,612 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:45,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:45,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:45,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:45,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:45,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:45,655 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 10 treesize of output 9 [2022-11-25 22:13:45,764 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:45,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:45,857 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 15 treesize of output 14 [2022-11-25 22:13:45,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:45,956 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 15 treesize of output 14 [2022-11-25 22:13:46,012 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 15 treesize of output 14 [2022-11-25 22:13:46,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:46,086 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 10 treesize of output 9 [2022-11-25 22:13:46,154 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:46,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:46,209 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 15 treesize of output 14 [2022-11-25 22:13:46,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:46,272 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 10 treesize of output 9 [2022-11-25 22:13:46,339 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:46,390 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 15 treesize of output 14 [2022-11-25 22:13:46,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:46,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3412#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:46,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:46,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:46,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 22:13:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260912933] [2022-11-25 22:13:46,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 22:13:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:46,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 22:13:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-25 22:13:46,812 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:47,259 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2022-11-25 22:13:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 22:13:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-25 22:13:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:47,260 INFO L225 Difference]: With dead ends: 127 [2022-11-25 22:13:47,261 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:13:47,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 22:13:47,262 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 196 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:47,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 21 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:13:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2022-11-25 22:13:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 89 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2022-11-25 22:13:47,267 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 38 [2022-11-25 22:13:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:47,267 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2022-11-25 22:13:47,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2022-11-25 22:13:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 22:13:47,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:47,269 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-25 22:13:47,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:47,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:13:47,474 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1844675833, now seen corresponding path program 2 times [2022-11-25 22:13:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:47,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611707906] [2022-11-25 22:13:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:47,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 87 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 22:13:47,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611707906] [2022-11-25 22:13:47,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611707906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:47,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712947692] [2022-11-25 22:13:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:47,680 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:47,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:13:47,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:13:47,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:13:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:47,797 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 9 treesize of output 11 [2022-11-25 22:13:47,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 22:13:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 22:13:48,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:13:48,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712947692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:48,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:13:48,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2022-11-25 22:13:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294051510] [2022-11-25 22:13:48,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:48,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:13:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:48,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:13:48,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:13:48,058 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-25 22:13:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:48,097 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-11-25 22:13:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:13:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 43 [2022-11-25 22:13:48,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:48,098 INFO L225 Difference]: With dead ends: 89 [2022-11-25 22:13:48,098 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 22:13:48,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:13:48,099 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:48,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:13:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 22:13:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-25 22:13:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-11-25 22:13:48,103 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 43 [2022-11-25 22:13:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:48,104 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-11-25 22:13:48,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-25 22:13:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-11-25 22:13:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 22:13:48,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:48,105 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-25 22:13:48,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:48,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:48,315 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash 631207499, now seen corresponding path program 2 times [2022-11-25 22:13:48,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:48,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624126557] [2022-11-25 22:13:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:48,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 16 proven. 87 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 22:13:48,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624126557] [2022-11-25 22:13:48,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624126557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685234602] [2022-11-25 22:13:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:48,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:48,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:13:48,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 22:13:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:13:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:48,971 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_400 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_27| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_20| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_20|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_20| v_ArrVal_400) |v_ULTIMATE.start_main_~#b~0#1.base_27| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_20| 0))))) is different from true [2022-11-25 22:13:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-25 22:13:48,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:13:48,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685234602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:13:48,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:13:48,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-25 22:13:48,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039744929] [2022-11-25 22:13:48,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:13:48,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:13:48,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:13:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=65, Unknown=1, NotChecked=16, Total=110 [2022-11-25 22:13:48,975 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:48,992 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-11-25 22:13:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:13:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-25 22:13:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:48,993 INFO L225 Difference]: With dead ends: 88 [2022-11-25 22:13:48,993 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 22:13:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=65, Unknown=1, NotChecked=16, Total=110 [2022-11-25 22:13:48,994 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-25 22:13:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 22:13:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 22:13:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-25 22:13:48,998 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 46 [2022-11-25 22:13:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:48,999 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-25 22:13:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-25 22:13:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:13:49,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:49,000 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 3, 3, 1, 1] [2022-11-25 22:13:49,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:49,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:49,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash -412062966, now seen corresponding path program 2 times [2022-11-25 22:13:49,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:49,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761550581] [2022-11-25 22:13:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:49,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 151 proven. 87 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-25 22:13:49,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761550581] [2022-11-25 22:13:49,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761550581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:49,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580331799] [2022-11-25 22:13:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:13:49,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:49,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:49,435 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:49,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:13:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:13:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:13:49,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:49,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:13:49,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:13:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-25 22:13:49,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-25 22:13:50,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580331799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440029313] [2022-11-25 22:13:50,214 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:50,214 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:50,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:50,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:50,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:50,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:50,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:50,262 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 15 treesize of output 14 [2022-11-25 22:13:50,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:50,435 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 15 treesize of output 14 [2022-11-25 22:13:50,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:13:50,519 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 10 treesize of output 9 [2022-11-25 22:13:50,577 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 15 treesize of output 14 [2022-11-25 22:13:50,607 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 15 treesize of output 14 [2022-11-25 22:13:50,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:50,659 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 15 treesize of output 14 [2022-11-25 22:13:50,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:50,772 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 15 treesize of output 14 [2022-11-25 22:13:50,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:50,827 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 15 treesize of output 14 [2022-11-25 22:13:50,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:50,947 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 15 treesize of output 14 [2022-11-25 22:13:50,977 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:51,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4620#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:51,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:51,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:51,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2022-11-25 22:13:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672964544] [2022-11-25 22:13:51,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:51,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 22:13:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:51,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 22:13:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-25 22:13:51,699 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:52,542 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2022-11-25 22:13:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:13:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-25 22:13:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:52,544 INFO L225 Difference]: With dead ends: 124 [2022-11-25 22:13:52,544 INFO L226 Difference]: Without dead ends: 124 [2022-11-25 22:13:52,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=443, Invalid=1813, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 22:13:52,546 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:52,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-25 22:13:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2022-11-25 22:13:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2022-11-25 22:13:52,550 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 50 [2022-11-25 22:13:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:52,551 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2022-11-25 22:13:52,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2022-11-25 22:13:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 22:13:52,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:52,552 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 4, 3, 3, 1, 1] [2022-11-25 22:13:52,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:13:52,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:52,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2140007842, now seen corresponding path program 3 times [2022-11-25 22:13:52,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:52,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812695786] [2022-11-25 22:13:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:52,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 155 proven. 448 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 22:13:53,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:53,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812695786] [2022-11-25 22:13:53,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812695786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:53,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110169563] [2022-11-25 22:13:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:13:53,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:53,230 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:53,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:13:53,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:13:53,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 22:13:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 22:13:53,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 22:13:54,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110169563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23202237] [2022-11-25 22:13:54,125 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:54,125 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:54,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:54,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:54,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:54,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:54,172 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 10 treesize of output 9 [2022-11-25 22:13:54,277 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:54,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:13:54,351 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 15 treesize of output 14 [2022-11-25 22:13:54,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:54,439 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 15 treesize of output 14 [2022-11-25 22:13:54,494 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 15 treesize of output 14 [2022-11-25 22:13:54,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:54,564 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 15 treesize of output 14 [2022-11-25 22:13:54,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:54,678 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 15 treesize of output 14 [2022-11-25 22:13:54,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:54,731 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 15 treesize of output 14 [2022-11-25 22:13:54,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:13:54,840 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 15 treesize of output 14 [2022-11-25 22:13:54,868 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:55,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5359#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:55,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:55,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:55,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-11-25 22:13:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370432675] [2022-11-25 22:13:55,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 22:13:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 22:13:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 22:13:55,710 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:57,322 INFO L93 Difference]: Finished difference Result 218 states and 248 transitions. [2022-11-25 22:13:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 22:13:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-25 22:13:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:57,324 INFO L225 Difference]: With dead ends: 218 [2022-11-25 22:13:57,324 INFO L226 Difference]: Without dead ends: 218 [2022-11-25 22:13:57,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2678, Invalid=8452, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:13:57,327 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 99 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:57,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 7 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:13:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-25 22:13:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-11-25 22:13:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.206896551724138) internal successors, (245), 204 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 245 transitions. [2022-11-25 22:13:57,333 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 245 transitions. Word has length 71 [2022-11-25 22:13:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:57,334 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 245 transitions. [2022-11-25 22:13:57,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 245 transitions. [2022-11-25 22:13:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 22:13:57,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:57,335 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 1, 1] [2022-11-25 22:13:57,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 22:13:57,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:57,541 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:13:57,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:13:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2079239232, now seen corresponding path program 3 times [2022-11-25 22:13:57,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:13:57,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3057085] [2022-11-25 22:13:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:13:57,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:13:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:13:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 366 proven. 191 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-25 22:13:57,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:13:57,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3057085] [2022-11-25 22:13:57,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3057085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:13:57,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582477701] [2022-11-25 22:13:57,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:13:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:13:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:13:57,947 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:13:57,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:13:58,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:13:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:13:58,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:13:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:13:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 403 proven. 154 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-25 22:13:58,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:13:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 403 proven. 154 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-25 22:13:58,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582477701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:13:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447313300] [2022-11-25 22:13:58,459 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:13:58,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:13:58,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:13:58,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:13:58,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:13:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:13:58,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:13:58,499 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 15 treesize of output 14 [2022-11-25 22:13:58,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:13:58,636 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 15 treesize of output 14 [2022-11-25 22:13:58,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:13:58,723 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 10 treesize of output 9 [2022-11-25 22:13:58,772 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 15 treesize of output 14 [2022-11-25 22:13:58,804 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 15 treesize of output 14 [2022-11-25 22:13:58,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:58,870 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 10 treesize of output 9 [2022-11-25 22:13:58,929 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:58,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:58,980 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 15 treesize of output 14 [2022-11-25 22:13:58,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:13:59,019 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 10 treesize of output 9 [2022-11-25 22:13:59,080 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:13:59,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:13:59,132 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 15 treesize of output 14 [2022-11-25 22:13:59,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:13:59,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6364#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:13:59,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:13:59,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:13:59,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-25 22:13:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892562115] [2022-11-25 22:13:59,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:13:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:13:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:13:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:13:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-11-25 22:13:59,554 INFO L87 Difference]: Start difference. First operand 205 states and 245 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:59,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:13:59,937 INFO L93 Difference]: Finished difference Result 205 states and 239 transitions. [2022-11-25 22:13:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 22:13:59,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-25 22:13:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:13:59,939 INFO L225 Difference]: With dead ends: 205 [2022-11-25 22:13:59,939 INFO L226 Difference]: Without dead ends: 205 [2022-11-25 22:13:59,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:13:59,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:13:59,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:13:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-25 22:13:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-11-25 22:13:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.1773399014778325) internal successors, (239), 204 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 239 transitions. [2022-11-25 22:13:59,946 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 239 transitions. Word has length 73 [2022-11-25 22:13:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:13:59,947 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 239 transitions. [2022-11-25 22:13:59,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:13:59,947 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 239 transitions. [2022-11-25 22:13:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 22:13:59,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:13:59,948 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 1, 1] [2022-11-25 22:13:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:00,154 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:00,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1233380992, now seen corresponding path program 4 times [2022-11-25 22:14:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:00,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737579751] [2022-11-25 22:14:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 55 proven. 587 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:14:00,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:00,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737579751] [2022-11-25 22:14:00,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737579751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:00,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031470369] [2022-11-25 22:14:00,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:14:00,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:00,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:00,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:00,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 22:14:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 22:14:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:14:00,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 22:14:01,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031470369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:01,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022411914] [2022-11-25 22:14:01,130 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:01,130 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:01,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:01,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:01,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:01,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:01,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:01,170 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 10 treesize of output 9 [2022-11-25 22:14:01,280 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:14:01,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:14:01,365 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 15 treesize of output 14 [2022-11-25 22:14:01,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:01,446 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 10 treesize of output 9 [2022-11-25 22:14:01,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:14:01,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:01,557 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 15 treesize of output 14 [2022-11-25 22:14:01,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:01,670 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 15 treesize of output 14 [2022-11-25 22:14:01,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:01,730 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 15 treesize of output 14 [2022-11-25 22:14:01,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:01,822 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 15 treesize of output 14 [2022-11-25 22:14:01,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:02,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7281#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:02,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:02,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:02,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-11-25 22:14:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966093343] [2022-11-25 22:14:02,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:14:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:14:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:14:02,569 INFO L87 Difference]: Start difference. First operand 205 states and 239 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:03,220 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2022-11-25 22:14:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:14:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-25 22:14:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:03,222 INFO L225 Difference]: With dead ends: 204 [2022-11-25 22:14:03,223 INFO L226 Difference]: Without dead ends: 204 [2022-11-25 22:14:03,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 201 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=714, Invalid=2708, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 22:14:03,225 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:03,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 9 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:14:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-25 22:14:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-25 22:14:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.17) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2022-11-25 22:14:03,231 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 76 [2022-11-25 22:14:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:03,231 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2022-11-25 22:14:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2022-11-25 22:14:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 22:14:03,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:03,233 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 1, 1] [2022-11-25 22:14:03,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 22:14:03,438 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 986802924, now seen corresponding path program 5 times [2022-11-25 22:14:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892872575] [2022-11-25 22:14:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 640 proven. 344 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-25 22:14:03,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892872575] [2022-11-25 22:14:03,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892872575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:03,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883448849] [2022-11-25 22:14:03,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:14:03,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:03,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:03,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 22:14:03,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:14:03,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:14:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:03,992 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:14:03,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:14:04,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:14:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-25 22:14:04,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-25 22:14:04,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883448849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:04,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85930674] [2022-11-25 22:14:04,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:04,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:04,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:04,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:04,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:04,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:04,964 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 10 treesize of output 9 [2022-11-25 22:14:05,092 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:14:05,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:14:05,154 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 15 treesize of output 14 [2022-11-25 22:14:05,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:05,223 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 10 treesize of output 9 [2022-11-25 22:14:05,276 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 15 treesize of output 14 [2022-11-25 22:14:05,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:05,346 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 15 treesize of output 14 [2022-11-25 22:14:05,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:05,445 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 15 treesize of output 14 [2022-11-25 22:14:05,470 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 16 treesize of output 12 [2022-11-25 22:14:05,498 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 15 treesize of output 14 [2022-11-25 22:14:05,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:05,595 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 15 treesize of output 14 [2022-11-25 22:14:05,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:06,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8330#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:06,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:06,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:06,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 18 [2022-11-25 22:14:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819581501] [2022-11-25 22:14:06,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 22:14:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 22:14:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:14:06,329 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:07,234 INFO L93 Difference]: Finished difference Result 201 states and 215 transitions. [2022-11-25 22:14:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 22:14:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-25 22:14:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:07,236 INFO L225 Difference]: With dead ends: 201 [2022-11-25 22:14:07,237 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 22:14:07,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 22:14:07,238 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:07,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:14:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 22:14:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-25 22:14:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.075) internal successors, (215), 200 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) [2022-11-25 22:14:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 215 transitions. [2022-11-25 22:14:07,244 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 215 transitions. Word has length 94 [2022-11-25 22:14:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:07,244 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 215 transitions. [2022-11-25 22:14:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 215 transitions. [2022-11-25 22:14:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-25 22:14:07,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:07,247 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 9, 8, 8, 1, 1] [2022-11-25 22:14:07,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 22:14:07,453 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1669795914, now seen corresponding path program 4 times [2022-11-25 22:14:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:07,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114442822] [2022-11-25 22:14:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:07,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2470 proven. 195 refuted. 0 times theorem prover too weak. 1347 trivial. 0 not checked. [2022-11-25 22:14:08,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114442822] [2022-11-25 22:14:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114442822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953712100] [2022-11-25 22:14:08,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:14:08,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:08,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 22:14:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:14:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2609 proven. 466 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-25 22:14:08,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2609 proven. 466 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-25 22:14:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953712100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440110418] [2022-11-25 22:14:09,356 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:09,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:09,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:09,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:09,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:09,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:09,406 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 15 treesize of output 14 [2022-11-25 22:14:09,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:14:09,581 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 15 treesize of output 14 [2022-11-25 22:14:09,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:14:09,675 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 10 treesize of output 9 [2022-11-25 22:14:09,726 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 15 treesize of output 14 [2022-11-25 22:14:09,756 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 15 treesize of output 14 [2022-11-25 22:14:09,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:09,807 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 15 treesize of output 14 [2022-11-25 22:14:09,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:09,924 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 15 treesize of output 14 [2022-11-25 22:14:09,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:09,978 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 15 treesize of output 14 [2022-11-25 22:14:10,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:10,091 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 15 treesize of output 14 [2022-11-25 22:14:10,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:10,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9858#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:10,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:10,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:10,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 36 [2022-11-25 22:14:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524537042] [2022-11-25 22:14:10,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:14:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:14:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:14:10,982 INFO L87 Difference]: Start difference. First operand 201 states and 215 transitions. Second operand has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:12,314 INFO L93 Difference]: Finished difference Result 201 states and 211 transitions. [2022-11-25 22:14:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 22:14:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-11-25 22:14:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:12,315 INFO L225 Difference]: With dead ends: 201 [2022-11-25 22:14:12,315 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 22:14:12,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 490 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=932, Invalid=4618, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 22:14:12,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:12,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:14:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 22:14:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-25 22:14:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.055) internal successors, (211), 200 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:12,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2022-11-25 22:14:12,323 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 173 [2022-11-25 22:14:12,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:12,323 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2022-11-25 22:14:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2022-11-25 22:14:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-25 22:14:12,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:12,326 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 9, 8, 8, 1, 1] [2022-11-25 22:14:12,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 22:14:12,526 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash 224288030, now seen corresponding path program 5 times [2022-11-25 22:14:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:12,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404032036] [2022-11-25 22:14:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2794 proven. 261 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-11-25 22:14:13,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404032036] [2022-11-25 22:14:13,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404032036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399924805] [2022-11-25 22:14:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:14:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:13,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:13,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 22:14:13,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 22:14:13,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 22:14:14,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2197 proven. 298 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2022-11-25 22:14:14,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2197 proven. 298 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2022-11-25 22:14:15,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399924805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032100311] [2022-11-25 22:14:15,444 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:15,445 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:15,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:15,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:15,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:15,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:15,483 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 15 treesize of output 14 [2022-11-25 22:14:15,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:14:15,625 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 15 treesize of output 14 [2022-11-25 22:14:15,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:14:15,708 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 10 treesize of output 9 [2022-11-25 22:14:15,781 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 15 treesize of output 14 [2022-11-25 22:14:15,814 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 15 treesize of output 14 [2022-11-25 22:14:15,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:15,874 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 15 treesize of output 14 [2022-11-25 22:14:15,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:15,994 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 15 treesize of output 14 [2022-11-25 22:14:16,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:16,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:14:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:16,150 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 15 treesize of output 14 [2022-11-25 22:14:16,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:17,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11481#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:17,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:17,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:17,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 62 [2022-11-25 22:14:17,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848659545] [2022-11-25 22:14:17,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-25 22:14:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-25 22:14:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=3958, Unknown=0, NotChecked=0, Total=4556 [2022-11-25 22:14:17,157 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:20,177 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2022-11-25 22:14:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-25 22:14:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-25 22:14:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:20,178 INFO L225 Difference]: With dead ends: 226 [2022-11-25 22:14:20,178 INFO L226 Difference]: Without dead ends: 226 [2022-11-25 22:14:20,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5718 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3080, Invalid=17226, Unknown=0, NotChecked=0, Total=20306 [2022-11-25 22:14:20,183 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 537 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:20,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 0 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:14:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-25 22:14:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-11-25 22:14:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 231 transitions. [2022-11-25 22:14:20,189 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 231 transitions. Word has length 182 [2022-11-25 22:14:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:20,189 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 231 transitions. [2022-11-25 22:14:20,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 231 transitions. [2022-11-25 22:14:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-25 22:14:20,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:20,192 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 10, 9, 9, 1, 1] [2022-11-25 22:14:20,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-25 22:14:20,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 22:14:20,399 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1290336034, now seen corresponding path program 6 times [2022-11-25 22:14:20,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:20,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223337246] [2022-11-25 22:14:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:20,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4614 proven. 1187 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-25 22:14:21,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223337246] [2022-11-25 22:14:21,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223337246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172504534] [2022-11-25 22:14:21,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:14:21,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:21,405 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:21,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 22:14:21,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:14:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 22:14:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4771 proven. 1030 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-25 22:14:22,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4771 proven. 1030 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-25 22:14:22,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172504534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:22,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900233823] [2022-11-25 22:14:22,761 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:22,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:22,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:22,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:22,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:22,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:22,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:22,799 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 10 treesize of output 9 [2022-11-25 22:14:22,882 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:14:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:14:22,963 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 15 treesize of output 14 [2022-11-25 22:14:22,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:14:23,061 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 15 treesize of output 14 [2022-11-25 22:14:23,102 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 15 treesize of output 14 [2022-11-25 22:14:23,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:14:23,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:23,194 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 15 treesize of output 14 [2022-11-25 22:14:23,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:23,330 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 15 treesize of output 14 [2022-11-25 22:14:23,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:23,401 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 15 treesize of output 14 [2022-11-25 22:14:23,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:23,516 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 15 treesize of output 14 [2022-11-25 22:14:23,568 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:24,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13447#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:24,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:24,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:24,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2022-11-25 22:14:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827087205] [2022-11-25 22:14:24,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:24,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 22:14:24,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:24,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 22:14:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1542, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 22:14:24,419 INFO L87 Difference]: Start difference. First operand 225 states and 231 transitions. Second operand has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:25,781 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2022-11-25 22:14:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 22:14:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 0 states have call successors, (0), 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 221 [2022-11-25 22:14:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:25,782 INFO L225 Difference]: With dead ends: 225 [2022-11-25 22:14:25,783 INFO L226 Difference]: Without dead ends: 225 [2022-11-25 22:14:25,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 629 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1695, Invalid=5961, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 22:14:25,785 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:25,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:14:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-25 22:14:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-25 22:14:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-11-25 22:14:25,790 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 221 [2022-11-25 22:14:25,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:25,791 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-11-25 22:14:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-11-25 22:14:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-25 22:14:25,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:25,794 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 10, 9, 9, 1, 1] [2022-11-25 22:14:25,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 22:14:26,002 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:26,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1167072994, now seen corresponding path program 7 times [2022-11-25 22:14:26,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409625963] [2022-11-25 22:14:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-25 22:14:27,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409625963] [2022-11-25 22:14:27,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409625963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:27,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407814898] [2022-11-25 22:14:27,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:14:27,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:27,574 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:27,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 22:14:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 22:14:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:27,928 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:14:27,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:14:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-25 22:14:29,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-25 22:14:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407814898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159279774] [2022-11-25 22:14:30,261 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:30,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:30,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:30,261 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:30,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:30,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:30,308 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 15 treesize of output 14 [2022-11-25 22:14:30,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:14:30,517 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 15 treesize of output 14 [2022-11-25 22:14:30,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:30,630 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 15 treesize of output 14 [2022-11-25 22:14:30,678 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 15 treesize of output 14 [2022-11-25 22:14:30,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:30,745 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 10 treesize of output 9 [2022-11-25 22:14:30,805 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:14:30,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:14:30,852 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 15 treesize of output 14 [2022-11-25 22:14:30,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:30,889 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 10 treesize of output 9 [2022-11-25 22:14:30,949 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:14:30,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:14:30,997 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 15 treesize of output 14 [2022-11-25 22:14:31,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:31,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15365#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:31,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:31,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:31,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-11-25 22:14:31,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315717310] [2022-11-25 22:14:31,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:31,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 22:14:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 22:14:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 22:14:31,584 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:33,057 INFO L93 Difference]: Finished difference Result 285 states and 300 transitions. [2022-11-25 22:14:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:14:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-11-25 22:14:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:33,059 INFO L225 Difference]: With dead ends: 285 [2022-11-25 22:14:33,060 INFO L226 Difference]: Without dead ends: 285 [2022-11-25 22:14:33,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=807, Invalid=3225, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:14:33,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:33,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 0 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:14:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-25 22:14:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 261. [2022-11-25 22:14:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0615384615384615) internal successors, (276), 260 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 276 transitions. [2022-11-25 22:14:33,067 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 276 transitions. Word has length 224 [2022-11-25 22:14:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 276 transitions. [2022-11-25 22:14:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 276 transitions. [2022-11-25 22:14:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-25 22:14:33,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:33,071 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 10, 9, 9, 1, 1] [2022-11-25 22:14:33,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 22:14:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 22:14:33,278 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash -621187358, now seen corresponding path program 8 times [2022-11-25 22:14:33,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:33,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570483844] [2022-11-25 22:14:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:33,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 803 proven. 8236 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-11-25 22:14:35,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570483844] [2022-11-25 22:14:35,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570483844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:35,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755721538] [2022-11-25 22:14:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:14:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:35,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:35,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 22:14:35,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-25 22:14:35,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:14:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 22:14:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:35,675 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:14:35,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:14:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 1491 proven. 4122 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2022-11-25 22:14:37,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:14:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 0 proven. 5613 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2022-11-25 22:14:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755721538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:14:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806217582] [2022-11-25 22:14:39,244 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:14:39,244 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:14:39,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:14:39,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:14:39,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:14:39,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:39,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:14:39,290 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 15 treesize of output 14 [2022-11-25 22:14:39,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:14:39,454 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 15 treesize of output 14 [2022-11-25 22:14:39,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:14:39,523 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 15 treesize of output 14 [2022-11-25 22:14:39,569 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 15 treesize of output 14 [2022-11-25 22:14:39,603 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 15 treesize of output 14 [2022-11-25 22:14:39,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:39,650 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 15 treesize of output 14 [2022-11-25 22:14:39,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:39,747 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 15 treesize of output 14 [2022-11-25 22:14:39,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:14:39,800 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 15 treesize of output 14 [2022-11-25 22:14:39,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:14:39,897 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 15 treesize of output 14 [2022-11-25 22:14:39,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:14:40,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17584#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:14:40,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:14:40,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:14:40,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17, 17] total 68 [2022-11-25 22:14:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432627335] [2022-11-25 22:14:40,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:14:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 22:14:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 22:14:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=4780, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 22:14:40,882 INFO L87 Difference]: Start difference. First operand 261 states and 276 transitions. Second operand has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:57,271 INFO L93 Difference]: Finished difference Result 451 states and 496 transitions. [2022-11-25 22:14:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-25 22:14:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 0 states have call successors, (0), 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 260 [2022-11-25 22:14:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:57,274 INFO L225 Difference]: With dead ends: 451 [2022-11-25 22:14:57,274 INFO L226 Difference]: Without dead ends: 451 [2022-11-25 22:14:57,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24483 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=14639, Invalid=49117, Unknown=0, NotChecked=0, Total=63756 [2022-11-25 22:14:57,281 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 846 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:57,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 0 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:14:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-25 22:14:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 402. [2022-11-25 22:14:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.087281795511222) internal successors, (436), 401 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 436 transitions. [2022-11-25 22:14:57,290 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 436 transitions. Word has length 260 [2022-11-25 22:14:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:57,290 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 436 transitions. [2022-11-25 22:14:57,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:14:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 436 transitions. [2022-11-25 22:14:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-25 22:14:57,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:57,293 INFO L195 NwaCegarLoop]: trace histogram [121, 121, 120, 13, 12, 12, 1, 1] [2022-11-25 22:14:57,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 22:14:57,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:57,500 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:14:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1746148366, now seen corresponding path program 9 times [2022-11-25 22:14:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:57,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538526972] [2022-11-25 22:14:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 16905 proven. 2795 refuted. 0 times theorem prover too weak. 3742 trivial. 0 not checked. [2022-11-25 22:14:59,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538526972] [2022-11-25 22:14:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538526972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:59,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604575638] [2022-11-25 22:14:59,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:14:59,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:59,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:59,460 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:59,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 22:15:01,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:15:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:01,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 22:15:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 7946 proven. 13767 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2022-11-25 22:15:03,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 7946 proven. 13767 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2022-11-25 22:15:04,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604575638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972783937] [2022-11-25 22:15:04,884 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:15:04,885 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:04,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:04,885 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:04,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:04,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:15:04,926 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 15 treesize of output 14 [2022-11-25 22:15:05,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:15:05,072 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 15 treesize of output 14 [2022-11-25 22:15:05,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:05,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:15:05,199 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 15 treesize of output 14 [2022-11-25 22:15:05,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:05,271 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 10 treesize of output 9 [2022-11-25 22:15:05,325 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:05,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:15:05,377 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 15 treesize of output 14 [2022-11-25 22:15:05,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:05,412 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 10 treesize of output 9 [2022-11-25 22:15:05,468 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:05,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:15:05,516 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 15 treesize of output 14 [2022-11-25 22:15:05,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:06,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21288#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:06,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:06,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:15:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 35, 35] total 88 [2022-11-25 22:15:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127172159] [2022-11-25 22:15:06,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-25 22:15:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-25 22:15:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=7523, Unknown=0, NotChecked=0, Total=8930 [2022-11-25 22:15:06,322 INFO L87 Difference]: Start difference. First operand 402 states and 436 transitions. Second operand has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:19,383 INFO L93 Difference]: Finished difference Result 894 states and 961 transitions. [2022-11-25 22:15:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2022-11-25 22:15:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 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 401 [2022-11-25 22:15:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:19,387 INFO L225 Difference]: With dead ends: 894 [2022-11-25 22:15:19,387 INFO L226 Difference]: Without dead ends: 894 [2022-11-25 22:15:19,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1128 SyntacticMatches, 4 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49209 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=17043, Invalid=119487, Unknown=0, NotChecked=0, Total=136530 [2022-11-25 22:15:19,395 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 699 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 4009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:19,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 5 Invalid, 4009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 22:15:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-25 22:15:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 891. [2022-11-25 22:15:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.0764044943820226) internal successors, (958), 890 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 958 transitions. [2022-11-25 22:15:19,412 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 958 transitions. Word has length 401 [2022-11-25 22:15:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:19,413 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 958 transitions. [2022-11-25 22:15:19,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 958 transitions. [2022-11-25 22:15:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-11-25 22:15:19,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:19,419 INFO L195 NwaCegarLoop]: trace histogram [230, 230, 229, 22, 21, 21, 1, 1] [2022-11-25 22:15:19,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:19,636 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:15:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:19,636 INFO L85 PathProgramCache]: Analyzing trace with hash 617893410, now seen corresponding path program 10 times [2022-11-25 22:15:19,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:19,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324271180] [2022-11-25 22:15:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 38728 proven. 726 refuted. 0 times theorem prover too weak. 45032 trivial. 0 not checked. [2022-11-25 22:15:23,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324271180] [2022-11-25 22:15:23,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324271180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:15:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895434992] [2022-11-25 22:15:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:15:23,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:23,487 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:23,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 22:15:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 3245 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 22:15:24,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 49344 proven. 3202 refuted. 0 times theorem prover too weak. 31940 trivial. 0 not checked. [2022-11-25 22:15:25,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 49344 proven. 3202 refuted. 0 times theorem prover too weak. 31940 trivial. 0 not checked. [2022-11-25 22:15:26,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895434992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233872611] [2022-11-25 22:15:26,411 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:15:26,411 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:26,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:26,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:26,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:26,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:26,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:15:26,457 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 10 treesize of output 9 [2022-11-25 22:15:26,590 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:26,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:15:26,693 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 15 treesize of output 14 [2022-11-25 22:15:26,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:15:26,792 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 15 treesize of output 14 [2022-11-25 22:15:26,863 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 15 treesize of output 14 [2022-11-25 22:15:26,895 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 15 treesize of output 14 [2022-11-25 22:15:26,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:26,996 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 10 treesize of output 9 [2022-11-25 22:15:27,048 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:27,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:15:27,101 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 15 treesize of output 14 [2022-11-25 22:15:27,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:27,140 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 15 treesize of output 14 [2022-11-25 22:15:27,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:15:27,262 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 15 treesize of output 14 [2022-11-25 22:15:27,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:28,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28219#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:28,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:28,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:15:28,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 66 [2022-11-25 22:15:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161661526] [2022-11-25 22:15:28,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:28,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-25 22:15:28,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-25 22:15:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=4375, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 22:15:28,310 INFO L87 Difference]: Start difference. First operand 891 states and 958 transitions. Second operand has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:34,003 INFO L93 Difference]: Finished difference Result 891 states and 947 transitions. [2022-11-25 22:15:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-25 22:15:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 0 states have call successors, (0), 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 755 [2022-11-25 22:15:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:34,007 INFO L225 Difference]: With dead ends: 891 [2022-11-25 22:15:34,007 INFO L226 Difference]: Without dead ends: 891 [2022-11-25 22:15:34,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2396 GetRequests, 2212 SyntacticMatches, 12 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8170 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4943, Invalid=25159, Unknown=0, NotChecked=0, Total=30102 [2022-11-25 22:15:34,011 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:34,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 4106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4088 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 22:15:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-25 22:15:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 891. [2022-11-25 22:15:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.0640449438202246) internal successors, (947), 890 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 947 transitions. [2022-11-25 22:15:34,027 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 947 transitions. Word has length 755 [2022-11-25 22:15:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:34,027 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 947 transitions. [2022-11-25 22:15:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 947 transitions. [2022-11-25 22:15:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-25 22:15:34,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:34,034 INFO L195 NwaCegarLoop]: trace histogram [239, 239, 238, 22, 21, 21, 1, 1] [2022-11-25 22:15:34,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:34,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:34,244 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:15:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -951918270, now seen corresponding path program 11 times [2022-11-25 22:15:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238374206] [2022-11-25 22:15:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:34,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:15:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 41545 proven. 846 refuted. 0 times theorem prover too weak. 48602 trivial. 0 not checked. [2022-11-25 22:15:38,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:15:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238374206] [2022-11-25 22:15:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238374206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:15:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002846398] [2022-11-25 22:15:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:15:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:38,427 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:15:38,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 22:15:39,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 22:15:39,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:15:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:15:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:15:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 33903 proven. 3534 refuted. 0 times theorem prover too weak. 53556 trivial. 0 not checked. [2022-11-25 22:15:41,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:15:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 33903 proven. 3534 refuted. 0 times theorem prover too weak. 53556 trivial. 0 not checked. [2022-11-25 22:15:44,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002846398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:15:44,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060015639] [2022-11-25 22:15:44,088 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:15:44,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:15:44,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:15:44,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:15:44,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:15:44,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:15:44,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:15:44,123 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 10 treesize of output 9 [2022-11-25 22:15:44,205 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:44,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:15:44,280 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 15 treesize of output 14 [2022-11-25 22:15:44,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:44,363 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 15 treesize of output 14 [2022-11-25 22:15:44,402 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 15 treesize of output 14 [2022-11-25 22:15:44,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:44,463 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 10 treesize of output 9 [2022-11-25 22:15:44,518 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:15:44,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:15:44,574 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 15 treesize of output 14 [2022-11-25 22:15:44,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:15:44,615 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 15 treesize of output 14 [2022-11-25 22:15:44,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:15:44,705 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 15 treesize of output 14 [2022-11-25 22:15:44,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:15:46,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35010#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:15:46,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:15:46,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:15:46,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 42, 42] total 112 [2022-11-25 22:15:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722530239] [2022-11-25 22:15:46,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:15:46,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-25 22:15:46,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:15:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-25 22:15:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1924, Invalid=11882, Unknown=0, NotChecked=0, Total=13806 [2022-11-25 22:15:46,174 INFO L87 Difference]: Start difference. First operand 891 states and 947 transitions. Second operand has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:15:57,181 INFO L93 Difference]: Finished difference Result 1030 states and 1091 transitions. [2022-11-25 22:15:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-25 22:15:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 0 states have call successors, (0), 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 782 [2022-11-25 22:15:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:15:57,184 INFO L225 Difference]: With dead ends: 1030 [2022-11-25 22:15:57,184 INFO L226 Difference]: Without dead ends: 1030 [2022-11-25 22:15:57,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2575 GetRequests, 2261 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31335 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=13440, Invalid=86100, Unknown=0, NotChecked=0, Total=99540 [2022-11-25 22:15:57,190 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1050 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:15:57,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 0 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:15:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-11-25 22:15:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 960. [2022-11-25 22:15:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.0573514077163713) internal successors, (1014), 959 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1014 transitions. [2022-11-25 22:15:57,206 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1014 transitions. Word has length 782 [2022-11-25 22:15:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:15:57,207 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1014 transitions. [2022-11-25 22:15:57,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:15:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1014 transitions. [2022-11-25 22:15:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2022-11-25 22:15:57,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:15:57,214 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 253, 22, 21, 21, 1, 1] [2022-11-25 22:15:57,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 22:15:57,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:15:57,422 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:15:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:15:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1184556578, now seen corresponding path program 12 times [2022-11-25 22:15:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:15:57,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611883042] [2022-11-25 22:15:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:15:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:15:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 53524 proven. 975 refuted. 0 times theorem prover too weak. 47879 trivial. 0 not checked. [2022-11-25 22:16:02,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611883042] [2022-11-25 22:16:02,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611883042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263388124] [2022-11-25 22:16:02,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:16:02,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:02,067 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:02,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 22:16:12,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:16:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:12,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 3509 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 22:16:12,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 82604 proven. 7422 refuted. 0 times theorem prover too weak. 12352 trivial. 0 not checked. [2022-11-25 22:16:13,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 82604 proven. 7422 refuted. 0 times theorem prover too weak. 12352 trivial. 0 not checked. [2022-11-25 22:16:15,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263388124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318026682] [2022-11-25 22:16:15,454 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:16:15,455 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:16:15,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:16:15,455 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:16:15,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:16:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:15,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:16:15,496 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 15 treesize of output 14 [2022-11-25 22:16:15,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:16:15,630 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 15 treesize of output 14 [2022-11-25 22:16:15,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:16:15,698 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 15 treesize of output 14 [2022-11-25 22:16:15,760 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 15 treesize of output 14 [2022-11-25 22:16:15,794 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 15 treesize of output 14 [2022-11-25 22:16:15,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:16:15,849 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 10 treesize of output 9 [2022-11-25 22:16:15,909 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:16:15,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:16:15,954 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 15 treesize of output 14 [2022-11-25 22:16:15,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:16:15,995 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 10 treesize of output 9 [2022-11-25 22:16:16,046 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:16:16,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:16:16,100 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 15 treesize of output 14 [2022-11-25 22:16:16,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:16:16,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42443#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:16:16,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:16:16,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:16:16,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 84 [2022-11-25 22:16:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746267227] [2022-11-25 22:16:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-25 22:16:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-25 22:16:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=6837, Unknown=0, NotChecked=0, Total=8010 [2022-11-25 22:16:16,777 INFO L87 Difference]: Start difference. First operand 960 states and 1014 transitions. Second operand has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:30,258 INFO L93 Difference]: Finished difference Result 960 states and 977 transitions. [2022-11-25 22:16:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-11-25 22:16:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 0 states have call successors, (0), 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 827 [2022-11-25 22:16:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:30,266 INFO L225 Difference]: With dead ends: 960 [2022-11-25 22:16:30,266 INFO L226 Difference]: Without dead ends: 960 [2022-11-25 22:16:30,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2717 GetRequests, 2412 SyntacticMatches, 14 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23052 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=15540, Invalid=70016, Unknown=0, NotChecked=0, Total=85556 [2022-11-25 22:16:30,273 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7803 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:30,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 7826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7803 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 22:16:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-25 22:16:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-11-25 22:16:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.018769551616267) internal successors, (977), 959 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 977 transitions. [2022-11-25 22:16:30,287 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 977 transitions. Word has length 827 [2022-11-25 22:16:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:30,288 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 977 transitions. [2022-11-25 22:16:30,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 977 transitions. [2022-11-25 22:16:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-11-25 22:16:30,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:30,296 INFO L195 NwaCegarLoop]: trace histogram [271, 271, 270, 22, 21, 21, 1, 1] [2022-11-25 22:16:30,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:30,519 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:16:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -46384582, now seen corresponding path program 13 times [2022-11-25 22:16:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888451371] [2022-11-25 22:16:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 68837 proven. 1260 refuted. 0 times theorem prover too weak. 46000 trivial. 0 not checked. [2022-11-25 22:16:34,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:34,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888451371] [2022-11-25 22:16:34,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888451371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:34,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709270181] [2022-11-25 22:16:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:16:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:34,613 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:34,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 22:16:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:35,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 3696 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 22:16:35,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 84616 proven. 7246 refuted. 0 times theorem prover too weak. 24235 trivial. 0 not checked. [2022-11-25 22:16:37,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 84616 proven. 7246 refuted. 0 times theorem prover too weak. 24235 trivial. 0 not checked. [2022-11-25 22:16:38,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709270181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:38,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891190134] [2022-11-25 22:16:38,770 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:16:38,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:16:38,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:16:38,770 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:16:38,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:16:38,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:38,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:16:38,815 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 10 treesize of output 9 [2022-11-25 22:16:38,899 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:16:38,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:16:38,984 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 15 treesize of output 14 [2022-11-25 22:16:39,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:16:39,054 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 10 treesize of output 9 [2022-11-25 22:16:39,098 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 15 treesize of output 14 [2022-11-25 22:16:39,132 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 15 treesize of output 14 [2022-11-25 22:16:39,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:16:39,194 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 15 treesize of output 14 [2022-11-25 22:16:39,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:16:39,285 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 15 treesize of output 14 [2022-11-25 22:16:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:16:39,334 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 15 treesize of output 14 [2022-11-25 22:16:39,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:16:39,430 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 15 treesize of output 14 [2022-11-25 22:16:39,453 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:16:40,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50124#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:16:40,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:16:40,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:16:40,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 86 [2022-11-25 22:16:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271629499] [2022-11-25 22:16:40,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-25 22:16:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-25 22:16:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=7181, Unknown=0, NotChecked=0, Total=8372 [2022-11-25 22:16:40,443 INFO L87 Difference]: Start difference. First operand 960 states and 977 transitions. Second operand has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:51,701 INFO L93 Difference]: Finished difference Result 960 states and 975 transitions. [2022-11-25 22:16:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-25 22:16:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 0 states have call successors, (0), 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 878 [2022-11-25 22:16:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:51,705 INFO L225 Difference]: With dead ends: 960 [2022-11-25 22:16:51,705 INFO L226 Difference]: Without dead ends: 960 [2022-11-25 22:16:51,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2839 GetRequests, 2565 SyntacticMatches, 16 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18412 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=11062, Invalid=56278, Unknown=0, NotChecked=0, Total=67340 [2022-11-25 22:16:51,710 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7503 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 7503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:51,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 7529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 7503 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 22:16:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-25 22:16:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-11-25 22:16:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.0166840458811262) internal successors, (975), 959 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 975 transitions. [2022-11-25 22:16:51,723 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 975 transitions. Word has length 878 [2022-11-25 22:16:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:51,724 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 975 transitions. [2022-11-25 22:16:51,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 975 transitions. [2022-11-25 22:16:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2022-11-25 22:16:51,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:51,732 INFO L195 NwaCegarLoop]: trace histogram [273, 273, 272, 22, 21, 21, 1, 1] [2022-11-25 22:16:51,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:51,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 22:16:51,943 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:16:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -88985198, now seen corresponding path program 14 times [2022-11-25 22:16:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:51,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646959539] [2022-11-25 22:16:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 89380 proven. 9278 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2022-11-25 22:16:55,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:55,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646959539] [2022-11-25 22:16:55,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646959539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:55,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128567004] [2022-11-25 22:16:55,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:16:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:55,941 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:55,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 22:16:57,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-25 22:16:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 22:16:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:57,306 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:16:57,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:17:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 0 proven. 18492 refuted. 0 times theorem prover too weak. 99276 trivial. 0 not checked. [2022-11-25 22:17:01,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 0 proven. 18492 refuted. 0 times theorem prover too weak. 99276 trivial. 0 not checked. [2022-11-25 22:17:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128567004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005493793] [2022-11-25 22:17:07,052 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:17:07,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:07,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:07,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:07,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:07,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:17:07,096 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 10 treesize of output 9 [2022-11-25 22:17:07,180 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:17:07,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:17:07,247 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 15 treesize of output 14 [2022-11-25 22:17:07,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:17:07,318 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 10 treesize of output 9 [2022-11-25 22:17:07,364 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 15 treesize of output 14 [2022-11-25 22:17:07,404 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 15 treesize of output 14 [2022-11-25 22:17:07,431 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 16 treesize of output 12 [2022-11-25 22:17:07,461 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 10 treesize of output 9 [2022-11-25 22:17:07,536 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:17:07,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:17:07,595 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 15 treesize of output 14 [2022-11-25 22:17:07,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:07,683 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 15 treesize of output 14 [2022-11-25 22:17:07,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:17:07,781 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 15 treesize of output 14 [2022-11-25 22:17:07,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:08,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57770#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:08,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:08,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:08,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24, 24] total 84 [2022-11-25 22:17:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273316058] [2022-11-25 22:17:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:08,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-25 22:17:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-25 22:17:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1359, Invalid=6831, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 22:17:08,874 INFO L87 Difference]: Start difference. First operand 960 states and 975 transitions. Second operand has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:22,558 INFO L93 Difference]: Finished difference Result 1044 states and 1078 transitions. [2022-11-25 22:17:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-11-25 22:17:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 0 states have call successors, (0), 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 884 [2022-11-25 22:17:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:22,562 INFO L225 Difference]: With dead ends: 1044 [2022-11-25 22:17:22,563 INFO L226 Difference]: Without dead ends: 1044 [2022-11-25 22:17:22,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2904 GetRequests, 2597 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27350 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=20764, Invalid=74408, Unknown=0, NotChecked=0, Total=95172 [2022-11-25 22:17:22,572 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 433 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:22,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 0 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 22:17:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-25 22:17:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 990. [2022-11-25 22:17:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.025278058645096) internal successors, (1014), 989 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1014 transitions. [2022-11-25 22:17:22,587 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1014 transitions. Word has length 884 [2022-11-25 22:17:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:22,587 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1014 transitions. [2022-11-25 22:17:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1014 transitions. [2022-11-25 22:17:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2022-11-25 22:17:22,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:22,596 INFO L195 NwaCegarLoop]: trace histogram [284, 284, 283, 22, 21, 21, 1, 1] [2022-11-25 22:17:22,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 22:17:22,805 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:17:22,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1702195846, now seen corresponding path program 15 times [2022-11-25 22:17:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:22,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591843011] [2022-11-25 22:17:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:22,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 102184 proven. 12671 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-25 22:17:27,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:17:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591843011] [2022-11-25 22:17:27,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591843011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:17:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715328961] [2022-11-25 22:17:27,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:17:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:27,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:27,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 22:17:40,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:17:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 3839 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 22:17:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 103001 proven. 11854 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-25 22:17:42,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 103001 proven. 11854 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-25 22:17:44,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715328961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:44,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76520183] [2022-11-25 22:17:44,278 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:17:44,279 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:17:44,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:17:44,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:17:44,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:17:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:44,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:17:44,324 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 10 treesize of output 9 [2022-11-25 22:17:44,407 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:17:44,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:17:44,491 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 15 treesize of output 14 [2022-11-25 22:17:44,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:44,559 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 15 treesize of output 14 [2022-11-25 22:17:44,610 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 15 treesize of output 14 [2022-11-25 22:17:44,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:44,668 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 10 treesize of output 9 [2022-11-25 22:17:44,722 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:17:44,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:17:44,783 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 15 treesize of output 14 [2022-11-25 22:17:44,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:17:44,824 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 15 treesize of output 14 [2022-11-25 22:17:44,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:17:44,920 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 15 treesize of output 14 [2022-11-25 22:17:44,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:45,970 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65824#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:17:45,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:17:45,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:17:45,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 81 [2022-11-25 22:17:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480983480] [2022-11-25 22:17:45,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-25 22:17:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:17:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-25 22:17:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1395, Invalid=6261, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 22:17:45,973 INFO L87 Difference]: Start difference. First operand 990 states and 1014 transitions. Second operand has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:55,304 INFO L93 Difference]: Finished difference Result 990 states and 1009 transitions. [2022-11-25 22:17:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-11-25 22:17:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 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 917 [2022-11-25 22:17:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:55,307 INFO L225 Difference]: With dead ends: 990 [2022-11-25 22:17:55,307 INFO L226 Difference]: Without dead ends: 990 [2022-11-25 22:17:55,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2998 GetRequests, 2684 SyntacticMatches, 19 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27023 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=23079, Invalid=64833, Unknown=0, NotChecked=0, Total=87912 [2022-11-25 22:17:55,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:55,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 22:17:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-25 22:17:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-25 22:17:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.0202224469160768) internal successors, (1009), 989 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1009 transitions. [2022-11-25 22:17:55,327 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1009 transitions. Word has length 917 [2022-11-25 22:17:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:55,327 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1009 transitions. [2022-11-25 22:17:55,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1009 transitions. [2022-11-25 22:17:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2022-11-25 22:17:55,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:55,336 INFO L195 NwaCegarLoop]: trace histogram [285, 285, 284, 22, 21, 21, 1, 1] [2022-11-25 22:17:55,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:55,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 22:17:55,551 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:17:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1736954910, now seen corresponding path program 16 times [2022-11-25 22:17:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:17:55,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378225405] [2022-11-25 22:17:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:17:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 1994 proven. 120487 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2022-11-25 22:18:01,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:01,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378225405] [2022-11-25 22:18:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378225405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:01,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720812575] [2022-11-25 22:18:01,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:18:01,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:01,481 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:01,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 22:18:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:02,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 3850 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 22:18:02,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 8955 proven. 113400 refuted. 0 times theorem prover too weak. 5691 trivial. 0 not checked. [2022-11-25 22:18:04,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 8955 proven. 113400 refuted. 0 times theorem prover too weak. 5691 trivial. 0 not checked. [2022-11-25 22:18:06,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720812575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286953692] [2022-11-25 22:18:06,617 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:18:06,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:06,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:06,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:06,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:06,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:06,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:18:06,655 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 10 treesize of output 9 [2022-11-25 22:18:06,737 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:18:06,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:18:06,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-25 22:18:06,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:18:06,898 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 10 treesize of output 9 [2022-11-25 22:18:06,946 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 15 treesize of output 14 [2022-11-25 22:18:06,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:18:07,010 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 15 treesize of output 14 [2022-11-25 22:18:07,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:18:07,103 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 15 treesize of output 14 [2022-11-25 22:18:07,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:18:07,149 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 15 treesize of output 14 [2022-11-25 22:18:07,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:18:07,255 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 15 treesize of output 14 [2022-11-25 22:18:07,278 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:08,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73825#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:08,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:08,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:08,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 47, 47] total 82 [2022-11-25 22:18:08,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150016446] [2022-11-25 22:18:08,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:08,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-25 22:18:08,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-25 22:18:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=6262, Unknown=0, NotChecked=0, Total=7832 [2022-11-25 22:18:08,508 INFO L87 Difference]: Start difference. First operand 990 states and 1009 transitions. Second operand has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:18:19,909 INFO L93 Difference]: Finished difference Result 1480 states and 1512 transitions. [2022-11-25 22:18:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 329 states. [2022-11-25 22:18:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 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 920 [2022-11-25 22:18:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:18:19,915 INFO L225 Difference]: With dead ends: 1480 [2022-11-25 22:18:19,915 INFO L226 Difference]: Without dead ends: 1480 [2022-11-25 22:18:19,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3138 GetRequests, 2682 SyntacticMatches, 45 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76243 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=30536, Invalid=139620, Unknown=0, NotChecked=0, Total=170156 [2022-11-25 22:18:19,925 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 359 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:18:19,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 8 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 22:18:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2022-11-25 22:18:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1194. [2022-11-25 22:18:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.021793797150042) internal successors, (1219), 1193 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1219 transitions. [2022-11-25 22:18:19,942 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1219 transitions. Word has length 920 [2022-11-25 22:18:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:18:19,942 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1219 transitions. [2022-11-25 22:18:19,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:18:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1219 transitions. [2022-11-25 22:18:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2022-11-25 22:18:19,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:18:19,952 INFO L195 NwaCegarLoop]: trace histogram [305, 305, 304, 23, 22, 22, 1, 1] [2022-11-25 22:18:19,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-25 22:18:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 22:18:20,163 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:18:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:18:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2139502194, now seen corresponding path program 17 times [2022-11-25 22:18:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:18:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258421259] [2022-11-25 22:18:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:18:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:18:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:18:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 118958 proven. 14639 refuted. 0 times theorem prover too weak. 12908 trivial. 0 not checked. [2022-11-25 22:18:25,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:18:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258421259] [2022-11-25 22:18:25,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258421259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:18:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679335441] [2022-11-25 22:18:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:18:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:18:25,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:18:25,119 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:18:25,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 22:18:26,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-25 22:18:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:18:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 22:18:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:18:26,944 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 22:18:26,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 22:18:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 17491 proven. 28433 refuted. 0 times theorem prover too weak. 100581 trivial. 0 not checked. [2022-11-25 22:18:32,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:18:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 3 proven. 45921 refuted. 0 times theorem prover too weak. 100581 trivial. 0 not checked. [2022-11-25 22:18:38,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679335441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:18:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68072410] [2022-11-25 22:18:38,827 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:18:38,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:18:38,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:18:38,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:18:38,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:18:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:18:38,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:18:38,862 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 15 treesize of output 14 [2022-11-25 22:18:38,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-25 22:18:38,993 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 15 treesize of output 14 [2022-11-25 22:18:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-25 22:18:39,072 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 10 treesize of output 9 [2022-11-25 22:18:39,127 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 15 treesize of output 14 [2022-11-25 22:18:39,160 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 15 treesize of output 14 [2022-11-25 22:18:39,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:18:39,210 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 15 treesize of output 14 [2022-11-25 22:18:39,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:18:39,304 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 15 treesize of output 14 [2022-11-25 22:18:39,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:18:39,355 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 10 treesize of output 9 [2022-11-25 22:18:39,408 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:18:39,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:18:39,450 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 15 treesize of output 14 [2022-11-25 22:18:39,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:18:40,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83150#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:18:40,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:18:40,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:18:40,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31, 31] total 104 [2022-11-25 22:18:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935326637] [2022-11-25 22:18:40,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:18:40,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-25 22:18:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:18:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-25 22:18:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=10249, Unknown=0, NotChecked=0, Total=12210 [2022-11-25 22:18:40,156 INFO L87 Difference]: Start difference. First operand 1194 states and 1219 transitions. Second operand has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:19,260 INFO L93 Difference]: Finished difference Result 1383 states and 1437 transitions. [2022-11-25 22:19:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2022-11-25 22:19:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 0 states have call successors, (0), 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 983 [2022-11-25 22:19:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:19,265 INFO L225 Difference]: With dead ends: 1383 [2022-11-25 22:19:19,265 INFO L226 Difference]: Without dead ends: 1383 [2022-11-25 22:19:19,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3395 GetRequests, 2880 SyntacticMatches, 0 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89416 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=45548, Invalid=221224, Unknown=0, NotChecked=0, Total=266772 [2022-11-25 22:19:19,284 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1081 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:19,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 0 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 22:19:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-25 22:19:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1236. [2022-11-25 22:19:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 1.0275303643724696) internal successors, (1269), 1235 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1269 transitions. [2022-11-25 22:19:19,301 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1269 transitions. Word has length 983 [2022-11-25 22:19:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:19,301 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1269 transitions. [2022-11-25 22:19:19,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:19:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1269 transitions. [2022-11-25 22:19:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2022-11-25 22:19:19,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:19,313 INFO L195 NwaCegarLoop]: trace histogram [362, 362, 361, 25, 24, 24, 1, 1] [2022-11-25 22:19:19,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 22:19:19,523 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:19:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1338453030, now seen corresponding path program 18 times [2022-11-25 22:19:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:19,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390526490] [2022-11-25 22:19:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 165250 proven. 16800 refuted. 0 times theorem prover too weak. 23513 trivial. 0 not checked. [2022-11-25 22:19:25,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390526490] [2022-11-25 22:19:25,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390526490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565616008] [2022-11-25 22:19:25,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:19:25,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:25,428 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:25,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 22:19:54,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:19:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:19:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 4793 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 22:19:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 2242 proven. 194736 refuted. 0 times theorem prover too weak. 8585 trivial. 0 not checked. [2022-11-25 22:19:58,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 2242 proven. 194736 refuted. 0 times theorem prover too weak. 8585 trivial. 0 not checked. [2022-11-25 22:20:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565616008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861104233] [2022-11-25 22:20:02,341 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:20:02,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:02,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:02,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:02,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:20:02,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:20:02,382 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 10 treesize of output 9 [2022-11-25 22:20:02,464 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:20:02,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:20:02,546 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 15 treesize of output 14 [2022-11-25 22:20:02,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 22:20:02,613 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 10 treesize of output 9 [2022-11-25 22:20:02,663 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 15 treesize of output 14 [2022-11-25 22:20:02,696 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 15 treesize of output 14 [2022-11-25 22:20:02,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:20:02,746 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 15 treesize of output 14 [2022-11-25 22:20:02,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:20:02,841 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 15 treesize of output 14 [2022-11-25 22:20:02,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:20:02,888 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 10 treesize of output 9 [2022-11-25 22:20:02,942 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:20:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:20:02,989 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 15 treesize of output 14 [2022-11-25 22:20:03,003 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:04,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93683#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:20:04,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:20:04,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:04,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 59, 59] total 141 [2022-11-25 22:20:04,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696213468] [2022-11-25 22:20:04,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-11-25 22:20:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-11-25 22:20:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3069, Invalid=18687, Unknown=0, NotChecked=0, Total=21756 [2022-11-25 22:20:04,068 INFO L87 Difference]: Start difference. First operand 1236 states and 1269 transitions. Second operand has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:20:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:44,201 INFO L93 Difference]: Finished difference Result 3538 states and 3725 transitions. [2022-11-25 22:20:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 620 states. [2022-11-25 22:20:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 0 states have call successors, (0), 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 1160 [2022-11-25 22:20:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:44,208 INFO L225 Difference]: With dead ends: 3538 [2022-11-25 22:20:44,208 INFO L226 Difference]: Without dead ends: 3538 [2022-11-25 22:20:44,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4137 GetRequests, 3357 SyntacticMatches, 19 SemanticMatches, 761 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220931 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=55314, Invalid=526092, Unknown=0, NotChecked=0, Total=581406 [2022-11-25 22:20:44,229 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1251 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14089 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 14255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 14089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:44,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 3 Invalid, 14255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 14089 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-25 22:20:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-11-25 22:20:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2313. [2022-11-25 22:20:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 1.0480103806228374) internal successors, (2423), 2312 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:20:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2423 transitions. [2022-11-25 22:20:44,262 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2423 transitions. Word has length 1160 [2022-11-25 22:20:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:44,263 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 2423 transitions. [2022-11-25 22:20:44,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:20:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2423 transitions. [2022-11-25 22:20:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1647 [2022-11-25 22:20:44,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:44,284 INFO L195 NwaCegarLoop]: trace histogram [517, 517, 516, 32, 31, 31, 1, 1] [2022-11-25 22:20:44,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:44,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 22:20:44,499 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:20:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1846788026, now seen corresponding path program 19 times [2022-11-25 22:20:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510027224] [2022-11-25 22:20:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:44,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 172873 proven. 5593 refuted. 0 times theorem prover too weak. 239145 trivial. 0 not checked. [2022-11-25 22:20:54,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510027224] [2022-11-25 22:20:54,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510027224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464630200] [2022-11-25 22:20:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:20:54,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:54,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:54,689 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:54,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 22:20:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 6722 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 22:20:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 303442 proven. 18082 refuted. 0 times theorem prover too weak. 96087 trivial. 0 not checked. [2022-11-25 22:20:59,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 303442 proven. 18082 refuted. 0 times theorem prover too weak. 96087 trivial. 0 not checked. [2022-11-25 22:21:02,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464630200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396753176] [2022-11-25 22:21:02,113 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:21:02,113 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:02,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:02,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:02,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:02,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:21:02,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:21:02,145 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 10 treesize of output 9 [2022-11-25 22:21:02,231 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:21:02,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:21:02,290 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 15 treesize of output 14 [2022-11-25 22:21:02,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:21:02,359 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 10 treesize of output 9 [2022-11-25 22:21:02,411 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 15 treesize of output 14 [2022-11-25 22:21:02,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:21:02,472 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 10 treesize of output 9 [2022-11-25 22:21:02,525 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:21:02,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:21:02,577 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 15 treesize of output 14 [2022-11-25 22:21:02,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:21:02,615 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 10 treesize of output 9 [2022-11-25 22:21:02,671 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:21:02,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:21:02,721 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 15 treesize of output 14 [2022-11-25 22:21:02,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:03,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '110758#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:21:03,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:03,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:03,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 46, 46] total 118 [2022-11-25 22:21:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588675674] [2022-11-25 22:21:03,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:03,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-25 22:21:03,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-25 22:21:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2155, Invalid=13097, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 22:21:03,551 INFO L87 Difference]: Start difference. First operand 2313 states and 2423 transitions. Second operand has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:21:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:33,772 INFO L93 Difference]: Finished difference Result 1875 states and 1929 transitions. [2022-11-25 22:21:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 347 states. [2022-11-25 22:21:33,773 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 0 states have call successors, (0), 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 1646 [2022-11-25 22:21:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:33,776 INFO L225 Difference]: With dead ends: 1875 [2022-11-25 22:21:33,777 INFO L226 Difference]: Without dead ends: 1875 [2022-11-25 22:21:33,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5310 GetRequests, 4845 SyntacticMatches, 22 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54543 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=33208, Invalid=164372, Unknown=0, NotChecked=0, Total=197580 [2022-11-25 22:21:33,787 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 131 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15712 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 15712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 0 Invalid, 15749 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 15712 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-25 22:21:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-25 22:21:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1875. [2022-11-25 22:21:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.0293489861259337) internal successors, (1929), 1874 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:21:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 1929 transitions. [2022-11-25 22:21:33,807 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 1929 transitions. Word has length 1646 [2022-11-25 22:21:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:33,808 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 1929 transitions. [2022-11-25 22:21:33,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:21:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 1929 transitions. [2022-11-25 22:21:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1692 [2022-11-25 22:21:33,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:33,889 INFO L195 NwaCegarLoop]: trace histogram [532, 532, 531, 32, 31, 31, 1, 1] [2022-11-25 22:21:33,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:34,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-25 22:21:34,090 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:21:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1638501726, now seen corresponding path program 20 times [2022-11-25 22:21:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:34,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427672195] [2022-11-25 22:21:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 156982 proven. 2760 refuted. 0 times theorem prover too weak. 281914 trivial. 0 not checked. [2022-11-25 22:21:45,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:45,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427672195] [2022-11-25 22:21:45,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427672195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864101155] [2022-11-25 22:21:45,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:21:45,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:45,425 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 22:21:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-11-25 22:21:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:21:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-25 22:21:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 123620 proven. 8713 refuted. 0 times theorem prover too weak. 309323 trivial. 0 not checked. [2022-11-25 22:21:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 123620 proven. 8713 refuted. 0 times theorem prover too weak. 309323 trivial. 0 not checked. [2022-11-25 22:22:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864101155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968312720] [2022-11-25 22:22:05,186 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:22:05,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:05,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:05,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:05,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:22:05,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 22:22:05,219 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 10 treesize of output 9 [2022-11-25 22:22:05,304 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:22:05,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-25 22:22:05,365 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 15 treesize of output 14 [2022-11-25 22:22:05,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:22:05,443 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 10 treesize of output 9 [2022-11-25 22:22:05,480 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 15 treesize of output 14 [2022-11-25 22:22:05,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 22:22:05,540 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 15 treesize of output 14 [2022-11-25 22:22:05,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-25 22:22:05,647 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 15 treesize of output 14 [2022-11-25 22:22:05,671 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 16 treesize of output 12 [2022-11-25 22:22:05,694 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 10 treesize of output 9 [2022-11-25 22:22:05,748 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-25 22:22:05,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-25 22:22:05,800 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 15 treesize of output 14 [2022-11-25 22:22:05,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:06,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125473#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:06,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:06,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 63, 63] total 176 [2022-11-25 22:22:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097455819] [2022-11-25 22:22:06,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:06,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-11-25 22:22:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:06,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-11-25 22:22:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4331, Invalid=28611, Unknown=0, NotChecked=0, Total=32942 [2022-11-25 22:22:07,000 INFO L87 Difference]: Start difference. First operand 1875 states and 1929 transitions. Second operand has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:27,784 INFO L93 Difference]: Finished difference Result 2170 states and 2233 transitions. [2022-11-25 22:22:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-11-25 22:22:27,784 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 0 states have call successors, (0), 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 1691 [2022-11-25 22:22:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:27,787 INFO L225 Difference]: With dead ends: 2170 [2022-11-25 22:22:27,787 INFO L226 Difference]: Without dead ends: 2170 [2022-11-25 22:22:27,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5428 GetRequests, 4946 SyntacticMatches, 0 SemanticMatches, 482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72273 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=31156, Invalid=202616, Unknown=0, NotChecked=0, Total=233772 [2022-11-25 22:22:27,801 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1831 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:27,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1831 Valid, 0 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5473 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 22:22:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-11-25 22:22:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1875. [2022-11-25 22:22:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.0240128068303096) internal successors, (1919), 1874 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 1919 transitions. [2022-11-25 22:22:27,820 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 1919 transitions. Word has length 1691 [2022-11-25 22:22:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:27,821 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 1919 transitions. [2022-11-25 22:22:27,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:22:27,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 1919 transitions. [2022-11-25 22:22:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1731 [2022-11-25 22:22:27,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:27,844 INFO L195 NwaCegarLoop]: trace histogram [545, 545, 544, 32, 31, 31, 1, 1] [2022-11-25 22:22:27,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:28,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:28,058 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-25 22:22:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash -649382550, now seen corresponding path program 21 times [2022-11-25 22:22:28,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:28,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043201582] [2022-11-25 22:22:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 463041 backedges. 196118 proven. 2988 refuted. 0 times theorem prover too weak. 263935 trivial. 0 not checked. [2022-11-25 22:22:40,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043201582] [2022-11-25 22:22:40,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043201582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242562818] [2022-11-25 22:22:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:22:40,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:40,043 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:40,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_869b0a04-79db-4772-b2fe-58149f71c736/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 22:26:57,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:26:57,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:26:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 7030 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 22:26:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 463041 backedges. 370181 proven. 26173 refuted. 0 times theorem prover too weak. 66687 trivial. 0 not checked. [2022-11-25 22:27:01,085 INFO L328 TraceCheckSpWp]: Computing backward predicates...